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 #601 : Systems Physiology

Which structure detect rotational acceleration of the head and body?

Possible Answers:

Cochlea

Eardrum

Semicircular canals

Endolymph

Ossicles

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 #1 : Sensory Organs

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

Possible Answers:

Meissner's corpuscle

Ruffini ending

Pacinian corpuscle

Merkel receptor

Free nerve ending

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 #2 : Sensory Organs

Which mechanoreceptors are located more superficially on the skin?

Possible Answers:

Pacinian corpuscles and Meissner's corpuscles

Meissner's corpuscles and Merkel receptors

Merkel receptor and Pacinian corpuscles

Meissner's corpuscles and Ruffini endings

Ruffini endings and free nerve endings

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 #47 : Peripheral Nervous System

The gate theory of pain indicates that mechanoreceptors __________ nociception.

Possible Answers:

None of these

do not affect

inhibit

agonize

induce

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 #48 : Peripheral Nervous System

What type of receptors are associated with A alpha fibers?

Possible Answers:

Free nerve endings

Hair follicles

Muscle spindles and Golgi tendon organs (GTO's)

Meissner's corpuscles and Merkel receptors

Pacinian corpuscles and Meissner corpuscles

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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