Human Anatomy and Physiology : Help with Proprioception and Mechanoreceptors

Study concepts, example questions & explanations for Human Anatomy and Physiology

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Example Questions

Example Question #41 : Peripheral Nervous System

Which structure detect rotational acceleration of the head and body?

Possible Answers:

Endolymph

Ossicles

Semicircular canals

Eardrum

Cochlea

Correct answer:

Semicircular canals

Explanation:

The semicircular canals detect rotation. They consist of three bony canals at right angles to each other. Each is filled with a fluid called endolymph and movement of the body causes the fluid to move. The fluid's movement against tiny hair cells within the canals allows the body to detect rotational acceleration. The cochlea is involved in hearing and the ossicles collectively transmit sound from the external environment/tympanic membrane to the cochlea.

Example Question #42 : Peripheral Nervous System

Which of the following is not considered to be a mechanoreceptor?

Possible Answers:

Meissner's corpuscle

Free nerve ending

Ruffini ending

Merkel receptor

Pacinian corpuscle

Correct answer:

Free nerve ending

Explanation:

Mechanoreceptors are associated with the perception of touch/proprioception. With this being said, free nerve endings give nociceptive sensory information to perceive pain and would not be considered mechanoreceptors, while all other options are.

Example Question #43 : Peripheral Nervous System

Which mechanoreceptors are located more superficially on the skin?

Possible Answers:

Meissner's corpuscles and Ruffini endings

Ruffini endings and free nerve endings

Pacinian corpuscles and Meissner's corpuscles

Merkel receptor and Pacinian corpuscles

Meissner's corpuscles and Merkel receptors

Correct answer:

Meissner's corpuscles and Merkel receptors

Explanation:

Both Meissner's corpuscles and Merkel receptors are located superficially underneath the top layer of the skin, the epidermis. This allows these receptors to have a smaller receptor field where more sensitive sensory information can be picked up. To help remember this, use the following tip: "M&Ms (Meissner/Merkel) are small (small receptor fields) and lay on top (superficially) of your hand."

Example Question #1 : Sensory Organs

The gate theory of pain indicates that mechanoreceptors __________ nociception.

Possible Answers:

agonize

induce

do not affect

inhibit

None of these

Correct answer:

inhibit

Explanation:

The gate theory suggests that mechanoreceptors inhibit nociception. This is done by the mechanoreceptors because they activate an inhibitory neuron that stops signaling of the nociceptors. This theory can apply to the human reaction to when we stub our toe, our natural reaction is to grab the hurt area which stimulates mechanoreceptors and inhibits the nociception.

Example Question #41 : Peripheral Nervous System

What type of receptors are associated with A alpha fibers?

Possible Answers:

Hair follicles

Muscle spindles and Golgi tendon organs (GTO's)

Pacinian corpuscles and Meissner corpuscles

Meissner's corpuscles and Merkel receptors

Free nerve endings

Correct answer:

Muscle spindles and Golgi tendon organs (GTO's)

Explanation:

Muscles spindles and GTO's are both receptors of A alpha fibers. These fibers are associated with proprioception within the body. Furthermore, muscle spindles respond to the stretch of a muscle while Golgi tendon organs respond to tension at the tendinous junctions.

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