Middle School Science Quiz: How Senses Detect Stimuli

20 questions · exam conditions

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How Senses Detect StimuliQuestion 1 of 20

Model: A diagram shows a feather touching the skin on an arm. In a skin cross-section, a labeled touch receptor is shown being pressed/bent where the feather touches. A small burst icon labeled "signal starts" appears at the receptor. A later panel shows the person scratching (response).

What evidence shows detection occurring in the model?

The person scratches, so the scratching is the evidence that detection is happening at that moment.

The feather is near the arm, so the stimulus is detected even without contact.

The touch receptor is shown being pressed where the feather contacts the skin, and the model labels "signal starts" at the receptor.

The arm looks irritated in the picture, which is enough evidence that receptors detected the feather.

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Middle School Science Quiz

Middle School Science Quiz: How Senses Detect Stimuli

Practice How Senses Detect Stimuli in Middle School Science with focused quiz questions that help you check what you know, review explanations, and build confidence with test-style prompts.

What this quiz covers

This quiz focuses on How Senses Detect Stimuli, giving you a quick way to practice the rules, question types, and explanations that matter most for Middle School Science.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

All questions

Question 1

What evidence shows detection occurring in the model?

The person scratches, so the scratching is the evidence that detection is happening at that moment.
The feather is near the arm, so the stimulus is detected even without contact.
The touch receptor is shown being pressed where the feather contacts the skin, and the model labels "signal starts" at the receptor. (correct answer)
The arm looks irritated in the picture, which is enough evidence that receptors detected the feather.

Explanation: The core skill is understanding how our senses detect stimuli, such as touch from a feather on the skin. Specialized receptors in the skin detect touch stimuli when they are pressed or bent by the contact. Models show this detection by illustrating the feather pressing the receptor and including icons like 'signal starts' at the site. To check understanding, find evidence in the model such as the bent receptor and signal icon, separate from responses like scratching. A common misconception is that visible irritation or scratching is the detection, but detection begins at the receptor interaction. Detection is the first step in sensing, converting the physical stimulus into a neural signal. This signal leads to processing in the brain and eventual responses.

Question 2

A simplified model shows bright light (stimulus) shining from a lamp in the environment onto the light receptors in the eye. The model shows a line from the lamp to the receptors and a label "signal begins in receptor." The person then squints (response). Which explanation shows how the stimulus is detected based on the model?

Remember: receptors detect stimuli, and detection is not the same as the response.

Light receptors detect the light stimulus when light reaches them, shown by "signal begins in receptor," and squinting is a separate response. (correct answer)
Squinting is how the eye detects the light, because detection and response are the same event.
Any cell in the body can detect bright light equally well, so receptors are not needed.
The person detects the light only after deciding to pay attention to it.

Explanation: The core skill in understanding how senses work is recognizing that our senses detect stimuli from the environment through specialized structures. Receptors in sensory organs detect stimuli by responding to specific changes like touch, light, or sound when they come into contact. Models often illustrate detection with arrows or labels showing where a signal begins at the receptor upon stimulus contact, such as bright light reaching eye receptors. To check understanding, examine the model for cues like 'signal begins in receptor' and ensure it's separate from the response like squinting. A common misconception is that detection requires conscious attention, but receptors detect automatically upon stimulus arrival. In all senses, detection is the initial step where receptors pick up the stimulus. This first step allows the body to process information and respond appropriately.

Question 3

A simplified model shows sharp pin (stimulus) pressing into the skin and contacting pain receptors near the surface. The model shows a cue "signal starts" at the receptor at the point of contact. The person then pulls their hand back (response). Which statement about detection is supported by evidence in the model?

Remember: receptors detect stimuli, and detection is not the same as the response.

The pin is detected because it is sharp-looking, even if it never touches the skin.
Pain receptors detect the pin stimulus when the pin presses into the skin and contacts them, shown by "signal starts." (correct answer)
Pulling the hand back is the detection step; receptors only cause movement.
The model proves the pin is literally inside the receptor, so detection only happens if the receptor is punctured.

Explanation: The core skill in understanding how senses work is recognizing that our senses detect stimuli from the environment through specialized structures. Receptors in sensory organs detect stimuli by responding to specific changes like touch, light, or sound when they come into contact. Models often illustrate detection with arrows or labels showing where a signal begins at the receptor upon stimulus contact, such as a pin pressing into pain receptors. To check understanding, examine the model for cues like 'signal starts' at the point of contact and ensure it's separate from the response like pulling the hand back. A common misconception is that appearance alone detects stimuli without physical contact, but detection requires receptor interaction. In all senses, detection is the initial step where receptors pick up the stimulus. This first step allows the body to process information and respond appropriately.

Question 4

A simplified model shows heat from a hot mug (stimulus) near the hand. The model shows heat receptors in the skin with two situations: (1) the mug is near but not touching the skin; (2) the mug touches the skin. Only in situation (2) the model includes a cue "signal starts." The person then moves their hand away (response). Which prediction about detection is supported by the model?

Remember: receptors detect stimuli, and detection is not the same as the response.

Detection will happen in both situations because heat is detected without any interaction with receptors.
Detection will happen only when the mug touches the skin, because the model shows "signal starts" only with contact at the receptors. (correct answer)
Detection will happen only if the person wants to move their hand away.
Detection happens because mugs are hot objects, so the label "signal starts" is not related to receptors.

Explanation: The core skill in understanding how senses work is recognizing that our senses detect stimuli from the environment through specialized structures. Receptors in sensory organs detect stimuli by responding to specific changes like touch, light, or sound when they come into contact. Models often illustrate detection with arrows or labels showing where a signal begins at the receptor upon stimulus contact, such as heat from a mug touching skin receptors. To check understanding, examine the model for cues like 'signal starts' only in contact situations and ensure it's separate from the response like moving the hand. A common misconception is that nearby stimuli are detected without contact, but models show detection requires direct interaction. In all senses, detection is the initial step where receptors pick up the stimulus. This first step allows the body to process information and respond appropriately.

Question 5

A simplified model shows a feather (stimulus) in the environment touching tiny touch receptors in the skin on a finger. The model includes an arrow labeled "signal starts" at the receptor when the feather makes contact. The finger then pulls away (response). Which statement about detection is supported by evidence in the model?

Remember: receptors detect stimuli, and detection is not the same as the response.

The feather is detected because it looks soft, even without touching the skin.
The brain detects the feather directly, and the receptors only move the finger.
The touch receptors detect the feather stimulus when contact occurs, shown by the "signal starts" arrow at the receptor. (correct answer)
The finger pulls away, so the pulling away itself is the detection of the feather.

Explanation: The core skill in understanding how senses work is recognizing that our senses detect stimuli from the environment through specialized structures. Receptors in sensory organs detect stimuli by responding to specific changes like touch, light, or sound when they come into contact. Models often illustrate detection with arrows or labels showing where a signal begins at the receptor upon stimulus contact, such as a feather touching skin receptors. To check understanding, examine the model for cues like 'signal starts' at the receptor and ensure it's separate from the response like pulling away. A common misconception is that the response, such as moving the finger, is the detection itself, but detection happens first at the receptors. In all senses, detection is the initial step where receptors pick up the stimulus. This first step allows the body to process information and respond appropriately.

Question 6

A simplified model shows pollen particles (stimulus) in the air landing on irritation receptors in the lining of the nose. The model shows "signal starts" at the receptors when pollen touches them. The person then sneezes (response). Which explanation shows how the stimulus is detected based on the model?

Remember: receptors detect stimuli, and detection is not the same as the response.

The person sneezes, so sneezing is the detection of pollen.
Pollen is detected because it is small; small things are always detected no matter where they are.
Irritation receptors detect the pollen stimulus when pollen contacts them, shown by "signal starts," and sneezing is a separate response. (correct answer)
Pollen is detected only after the brain thinks about pollen; receptors do not detect stimuli.

Explanation: The core skill in understanding how senses work is recognizing that our senses detect stimuli from the environment through specialized structures. Receptors in sensory organs detect stimuli by responding to specific changes like touch, light, or sound when they come into contact. Models often illustrate detection with arrows or labels showing where a signal begins at the receptor upon stimulus contact, such as pollen touching nose irritation receptors. To check understanding, examine the model for cues like 'signal starts' at the receptors and ensure it's separate from the response like sneezing. A common misconception is that small particles are detected regardless of location, but detection requires contact with specific receptors. In all senses, detection is the initial step where receptors pick up the stimulus. This first step allows the body to process information and respond appropriately.

Question 7

A simplified model shows a cold ice cube (stimulus) touching the skin. The model shows temperature receptors in the skin changing shape at the contact point, with a label "signal starts." The person then drops the ice (response). What evidence shows detection occurring in the model?

Remember: receptors detect stimuli, and detection is not the same as the response.

The "signal starts" label at the temperature receptors where the ice touches the skin. (correct answer)
The ice cube is cold, so it is automatically detected even without touching any sensory structure.
The person drops the ice, so dropping is the evidence of detection.
Because the model shows an ice cube, the skin must literally freeze solid to detect it.

Explanation: The core skill in understanding how senses work is recognizing that our senses detect stimuli from the environment through specialized structures. Receptors in sensory organs detect stimuli by responding to specific changes like touch, light, or sound when they come into contact. Models often illustrate detection with arrows or labels showing where a signal begins at the receptor upon stimulus contact, such as cold from ice changing skin receptor shape. To check understanding, examine the model for cues like 'signal starts' at the temperature receptors and ensure it's separate from the response like dropping the ice. A common misconception is that extreme stimuli are detected automatically without receptor involvement, but all detection occurs at receptors. In all senses, detection is the initial step where receptors pick up the stimulus. This first step allows the body to process information and respond appropriately.

Question 8

A simplified model shows smoke odor (stimulus) moving through air in the environment into the nose and binding to smell receptors in the nasal lining. The model includes a cue "receptor activated" where the odor reaches the receptors. The person then covers their nose (response). Which statement about detection is supported by evidence in the model?

Remember: receptors detect stimuli, and detection is not the same as the response.

The smoke is detected because it is visible in the air, even if it never reaches the nose.
The smell receptors detect the smoke odor when the odor reaches and activates them, shown by "receptor activated." (correct answer)
Covering the nose is the detection step; receptors are not involved in detection.
The smoke odor is detected randomly, not based on contact with receptors.

Explanation: The core skill in understanding how senses work is recognizing that our senses detect stimuli from the environment through specialized structures. Receptors in sensory organs detect stimuli by responding to specific changes like touch, light, or sound when they come into contact. Models often illustrate detection with arrows or labels showing where a signal begins at the receptor upon stimulus contact, such as smoke odor binding to nose receptors. To check understanding, examine the model for cues like 'receptor activated' and ensure it's separate from the response like covering the nose. A common misconception is that visible stimuli are detected without receptor contact, but detection requires direct interaction with receptors. In all senses, detection is the initial step where receptors pick up the stimulus. This first step allows the body to process information and respond appropriately.

Question 9

A simplified model shows sound waves (stimulus) from a speaker in the environment entering the ear and causing the eardrum (sensory structure) to vibrate. The model shows a label "receptor detects vibration" at the vibrating structure. The person then covers their ears (response). Which claim about sensing is incorrect based on the model?

Remember: receptors detect stimuli, and detection is not the same as the response.

The model supports that a sensory structure in the ear detects the sound stimulus when it vibrates.
Covering ears is a response that can happen after detection occurs in the ear.
The model supports that the stimulus (sound waves) is different from the response (covering ears).
The eardrum detects sound because it "knows" the person dislikes loud noise and chooses to detect it. (correct answer)

Explanation: The core skill in understanding how senses work is recognizing that our senses detect stimuli from the environment through specialized structures. Receptors in sensory organs detect stimuli by responding to specific changes like touch, light, or sound when they come into contact. Models often illustrate detection with arrows or labels showing where a signal begins at the receptor upon stimulus contact, such as sound waves vibrating the eardrum. To check understanding, examine the model for cues like 'receptor detects vibration' and ensure it's separate from the response like covering ears. A common misconception is that detection involves personal preferences or choices, but it occurs automatically at sensory structures. In all senses, detection is the initial step where receptors pick up the stimulus. This first step allows the body to process information and respond appropriately.

Question 10

A simplified model shows lemon juice (stimulus) on the tongue contacting taste receptors on taste buds. The model shows a cue "receptor activated" at the taste buds. The person then makes a sour face (response). Which statement about detection is supported by evidence in the model?

Remember: receptors detect stimuli, and detection is not the same as the response.

Taste receptors detect the lemon juice stimulus when the juice contacts and activates them, shown at the taste buds. (correct answer)
The sour face is the detection; receptors only create the facial expression.
The tongue detects lemon juice because it is yellow, even without any contact with taste receptors.
One kind of receptor can detect all stimuli (taste, light, sound), so taste receptors are not specific.

Explanation: The core skill in understanding how senses work is recognizing that our senses detect stimuli from the environment through specialized structures. Receptors in sensory organs detect stimuli by responding to specific changes like touch, light, or sound when they come into contact. Models often illustrate detection with arrows or labels showing where a signal begins at the receptor upon stimulus contact, such as lemon juice activating taste buds. To check understanding, examine the model for cues like 'receptor activated' at the taste receptors and ensure it's separate from the response like making a sour face. A common misconception is that receptors are not specific and can detect any stimulus, but each type detects particular ones like taste. In all senses, detection is the initial step where receptors pick up the stimulus. This first step allows the body to process information and respond appropriately.

Question 11

A model shows a cactus spine (stimulus) pressing into skin. Pain receptors in the skin (receptor) show a "signal" icon at the point of contact. The person says "Ouch!" (response). Which claim about sensing is incorrect?

Receptors detect stimuli, and the model shows detection when the spine contacts pain receptors and a signal begins there.
Saying "Ouch!" is a response that happens after detection begins at the receptor.
Detection is done by the receptor cells at the skin, not by the spine itself.
The cactus spine detects the skin and chooses to cause pain, so the stimulus is the detector. (correct answer)

Explanation: This question tests understanding of how senses detect stimuli and identifies incorrect claims about the detection process. Receptors are specialized cells that detect stimuli—pain receptors in the skin detect harmful stimuli like the cactus spine pressing into tissue. The model correctly shows detection when the spine contacts pain receptors and a signal begins there, not when the person says "Ouch!" The checking strategy is to identify which part does the detecting—it's always the receptor cells, never the stimulus itself. The misconception in option D is that the stimulus (cactus spine) can detect and make choices, but only receptor cells can detect. Detection is the first step in sensing, occurring at the receptor when the stimulus makes contact, and stimuli are passive—they cannot detect or choose anything.

Question 12

A model shows a flashlight beam (stimulus) shining onto the eye. Light receptors (receptor) show a "signal" icon starting where the light reaches them. The student turns their head away (response). Which explanation shows how the stimulus is detected, based on the model?

The head turn is the detection step, because detection means moving away from a stimulus.
The brain detects the light directly, so receptors are not needed for detection evidence in the model.
Detection occurs when the light stimulus reaches the light receptors and starts a signal there; turning away is a separate response. (correct answer)
The signal icon is literal proof that a tiny light is inside the eye, so the model shows a real object turning on.

Explanation: This question tests understanding of how senses detect stimuli using light detection as an example. Receptors are specialized cells that detect specific stimuli—light receptors in the eye detect light when it reaches them. The model shows detection occurring when the flashlight beam reaches light receptors, with the signal icon appearing at the receptors to indicate detection is happening. When checking models, look for where the signal begins—it starts at the receptor when light reaches it, not when the head turns. A misconception is thinking behavioral responses like turning away are detection, but detection happens at the receptor level first. Detection is the first step in sensing, occurring instantly when light reaches the receptors, before any conscious response like turning the head away.

Question 13

A model shows a cold wind (stimulus) blowing onto exposed skin. Temperature receptors in the skin (receptor) show a "signal" icon starting when the cold air contacts the skin. The person puts on a jacket (response). Which prediction about detection is supported if the temperature receptors fail to detect the stimulus?

A signal would still start at the temperature receptors even if they fail, because detection does not depend on receptors.
The person would still put on a jacket because responses always happen even when receptors do not detect stimuli.
The model would show no signal starting at the temperature receptors when cold air contacts the skin, because receptors detect stimuli and failure stops detection evidence. (correct answer)
The cold wind would be detected by any body cell equally, so receptor failure would not change detection evidence in the model.

Explanation: This question explores how senses detect stimuli by examining what happens when receptors fail. Receptors are specialized cells that detect specific stimuli, and without functioning receptors, detection cannot occur. The model would show no signal starting at the temperature receptors if they fail, because the signal icon represents detection happening at the receptor. To check predictions about failed receptors, remember that detection requires working receptors—no receptor function means no detection signal. A misconception is thinking detection can happen without receptors or that responses occur regardless of detection, but receptors are essential for detecting stimuli. Detection is the first step in sensing, and when receptors fail, this crucial first step cannot happen, preventing the normal sensing process.

Question 14

A model shows a feather (stimulus) brushing against skin on the arm. Touch receptors in the skin (receptor) are shown with a small "signal" icon starting when the feather makes contact. The person laughs and moves their arm away (response). Which statement about detection is supported by the model?

The laugh is the detection step, because detection means showing an emotion.
The touch receptors detect the feather stimulus when contact occurs, shown by the signal starting at the receptors; moving away is a response. (correct answer)
The feather is detected without touching because touch receptors can sense nearby objects through the air.
One type of receptor can detect all stimuli (touch, light, sound), so the same receptor would detect the feather and bright light.

Explanation: This question examines how senses detect stimuli through the example of touch detection. Receptors are specialized cells that detect specific stimuli—touch receptors in the skin detect physical contact like the feather brushing against skin. The model shows detection happening when the feather makes contact with touch receptors, evidenced by the signal icon appearing at that moment of contact. When analyzing detection, check where the signal starts in the model—it begins at the receptor upon contact, not during the response. A misconception is thinking emotions or movements are detection, but detection occurs at the receptor level when the stimulus contacts it. Detection is the first step in sensing, happening instantly at contact, while laughing and moving away are responses that follow detection. Touch receptors cannot detect objects without physical contact.

Question 15

A model shows sound waves (stimulus) entering the ear and causing vibration of hair-cell receptors in the inner ear (receptor). A "signal" icon appears at the hair cells. The student covers their ears afterward (response). What evidence shows detection occurring in the model?

Detection occurs because the student intends to hear, so the receptors detect only when the student wants them to.
The signal icon begins at the hair-cell receptors when sound vibrations reach them, showing receptors detect the sound stimulus. (correct answer)
Covering the ears is the evidence of detection, because a behavior is the same as detecting a stimulus.
Detection is shown because the ear looks like a funnel, so appearance alone proves it detects sound.

Explanation: This question tests understanding of how senses detect stimuli, specifically sound detection in the ear. Receptors are specialized cells that detect specific stimuli—here, hair cells in the inner ear detect sound vibrations. The model shows detection occurring when sound waves cause vibrations that reach the hair-cell receptors, with the signal icon appearing at the receptors as evidence. To verify detection in a model, look for where the signal begins—it starts at the receptor when the stimulus reaches it. A common misconception is thinking that behavioral responses like covering ears are the same as detection, but detection happens at the receptor level first. Detection is the first step in sensing, occurring instantly when vibrations reach the hair cells, before any conscious response like covering the ears.

Question 16

A model shows lemon juice (stimulus) dissolving in saliva and contacting taste receptors on the tongue (receptor). A "signal" icon appears at the taste receptors. The student makes a sour face (response). Which explanation shows how the stimulus is detected, using evidence from the model?

Detection happens when taste receptors contact the dissolved lemon-juice stimulus and start a signal; making a face is a separate response. (correct answer)
Detection happens in the stomach, because the tongue only labels flavors but does not detect stimuli.
Detection happens because the student knows lemons are sour, so thinking detects the stimulus.
Detection happens when the student makes a face, because the response is the same as detection.

Explanation: This question tests understanding of how senses detect stimuli using taste as an example. Receptors are specialized cells that detect specific stimuli—taste receptors on the tongue detect dissolved chemicals from food or drink. The model shows detection occurring when dissolved lemon juice contacts taste receptors, with the signal icon appearing at the receptors as evidence. To check understanding, identify where detection happens—at the receptor when the stimulus makes contact, not when the person makes a face. A common misconception is thinking that responses like facial expressions are detection, but detection happens first at the receptor level. Detection is the first step in sensing, occurring when dissolved molecules reach taste receptors, while making a sour face is a response that follows detection.

Question 17

A student touches a hot metal spoon. In the model, heat from the spoon (stimulus) contacts temperature receptors in the skin (receptor), and a small "signal" icon appears at the receptor. The student then quickly pulls their hand away (response). Which statement about detection is supported by the model, using evidence from the signal icon?

Detection happens when the heat stimulus contacts the skin receptor and a signal starts at the receptor; pulling away is a separate response. (correct answer)
Detection happens even without contact, because temperature receptors can detect heat from any distance in the room.
Detection happens when the hand pulls away, because movement is the evidence that the stimulus was detected.
Detection happens because the student decides the spoon is hot, so the receptor detects only after thinking about it.

Explanation: This question tests understanding of how senses detect stimuli, specifically when detection occurs versus when responses happen. Receptors are specialized cells that detect specific stimuli when those stimuli make contact with or reach the receptor. In this model, the heat stimulus contacts temperature receptors in the skin, and the signal icon appearing at the receptor shows that detection is happening right at that moment of contact. The key checking strategy is to look for where the signal starts—it begins at the receptor when the stimulus reaches it, not when the hand pulls away. A common misconception is thinking that detection and response are the same thing, but detection is the receptor recognizing the stimulus while response is the action taken afterward. Detection is always the first step in sensing, occurring at the receptor level before any behavioral response.

Question 18

Model: A diagram shows a student holding an ice cube. In a close-up of the fingertip skin, a labeled cold receptor is shown in contact with cooled skin tissue. A label says "signal begins." A later panel shows the student dropping the ice cube (response).

Which prediction about detection is supported if the cold receptor fails to work?

The student would still detect the cold stimulus because all skin cells detect temperature without receptors.
The student would not detect the cold stimulus in that fingertip because the receptor would not start a detection signal when the cooled skin contacts it; dropping the ice cube is a separate response. (correct answer)
The student would detect the cold stimulus as soon as they see the ice cube, even without any contact.
The student would still detect the cold stimulus because the response (dropping) is what causes detection.

Explanation: The core skill is understanding how our senses detect stimuli, such as cold from an ice cube on the skin. Specialized receptors in the skin detect cold stimuli when they contact cooled tissue. Models show this detection by depicting the receptor in contact with cooled skin and labeling 'signal begins.' To check understanding, predict outcomes like failed detection if the receptor doesn't work, distinguishing from responses like dropping the object. A common misconception is that seeing the stimulus causes detection without contact, but it requires receptor interaction. Detection is the first step in sensing, starting a signal at the receptor. This signal enables the nervous system to respond appropriately.

Question 19

A model shows dust particles (stimulus) landing on receptors in the lining of the nose (receptor). A "signal" icon appears at the receptors. The person sneezes (response). Which statement about detection is supported by the model, using evidence?

Sneezing is the detection step, because detection and response are the same event.
Detection is shown when dust contacts the nose receptors and a signal starts there; sneezing is a response that follows detection. (correct answer)
The receptors detect dust only if the person wants to sneeze, because detection is based on intent.
The dust is detected because it looks gray, and appearance alone is evidence of detection.

Explanation: This question examines how senses detect stimuli through the example of dust detection in the nose. Receptors are specialized cells that detect specific stimuli—receptors in the nose lining detect particles like dust when they make contact. The model shows detection happening when dust lands on nose receptors, with the signal icon appearing at the receptors as evidence of detection. To verify understanding, check where the signal starts—at the receptor upon contact with dust, not during sneezing. A common misconception is confusing the response (sneezing) with detection itself, but detection occurs first at the receptor level. Detection is the first step in sensing, happening instantly when dust contacts receptors, while sneezing is a protective response that follows detection.

Question 20

Model: A diagram shows a cup of hot cocoa on a table. A fingertip touches the side of the cup. In the skin of the fingertip, a labeled temperature receptor is shown contacting warmed skin tissue. An arrow labeled "signal starts" points from the receptor into the fingertip. A second arrow shows the finger pulling away later (the response).

Which statement about detection is supported by the model, using evidence from the model?

The brain detects the heat stimulus directly from the cup without the receptor needing to interact with warmed skin.
Detection happens when the finger pulls away, because the movement is the evidence of sensing.
The temperature receptor detects the heat stimulus when the warmed skin contacts the receptor, shown by the "signal starts" arrow; pulling away is the response. (correct answer)
Any cell in the fingertip detects heat the same way, so the labeled receptor is not needed as evidence.

Explanation: The core skill is understanding how our senses detect stimuli, such as heat from a hot object like a cup of cocoa. Specialized receptors in the skin detect temperature stimuli when they interact with warmed skin tissue. Models show this detection by depicting the stimulus contacting the receptor and including labels like 'signal starts' at that point. To check understanding, identify the receptor in the model and confirm the signal begins there, distinguishing it from later responses like pulling away. A common misconception is that the finger's movement is the detection, but detection occurs at the receptor before any response. Detection is the first step in sensing, where the receptor converts the stimulus into a neural signal. This signal is then processed by the nervous system to produce awareness or a behavioral response.