Question 1

Which of the following best describes the process of transduction in sensory receptors?

Accepted Answer

The conversion of one form of energy, such as light or sound, into nerve signals.

Question 2

A patient is unable to distinguish between two closely spaced points on their back, but can easily do so on their fingertip. This is best explained by differences in:

Accepted Answer

The size of receptive fields in different body regions.

Question 3

Which of the following is NOT a way the brain encodes the intensity of a stimulus?

Accepted Answer

By the type of neurotransmitter released at the synapse.

Question 4

Which receptor type is responsible for detecting changes in temperature?

Accepted Answer

Thermoreceptors

Question 5

A person experiences a sharp, localized pain immediately after touching a hot stove, followed by a dull, aching pain. Which fibers are responsible for the dull, aching pain?

Accepted Answer

Unmyelinated fibers transmitting slow pain

Question 6

Which of the following best explains why hot peppers cause a burning sensation in the mouth?

Accepted Answer

They stimulate free nerve endings (pain receptors), not taste buds.

Question 7

Which structure in the ear is primarily responsible for detecting angular acceleration, such as when turning your head quickly?

Accepted Answer

Semicircular ducts

Question 8

A person with damage to their olfactory mucosa would most likely experience which of the following symptoms?

Accepted Answer

Reduced ability to distinguish odors

Question 9

Which of the following statements about taste cells is TRUE?

Accepted Answer

Taste cells are epithelial cells that release neurotransmitters onto sensory neurons.

Question 10

Which of the following best describes the function of endogenous opioids such as enkephalins and endorphins?

Accepted Answer

They block the transmission of pain signals and can produce feelings of pleasure.

Question 11

A patient with a genetic mutation resulting in the absence of L cones in the retina would most likely experience which condition?

Accepted Answer

Red-green color blindness

Question 12

Which of the following is a correct sequence for the transmission of a pain signal from the site of injury to the brain?

Accepted Answer

Nociceptor → spinal cord → thalamus → primary somesthetic cortex

Question 13

Which of the following best explains why the tympanic membrane is highly sensitive to pain?

Accepted Answer

It is innervated by sensory branches of the vagus and trigeminal nerves.

Question 14

Which of the following is TRUE regarding the maculae of the saccule and utricle?

Accepted Answer

They contain hair cells with stereocilia embedded in an otolithic membrane.

Question 15

A person with damage to their auditory ossicles would most likely experience which of the following?

Accepted Answer

Impaired transmission of sound vibrations from the tympanic membrane to the inner ear.

Question 16

Which of the following best describes the labeled line code in sensory pathways?

Accepted Answer

Each nerve pathway from sensory cells to the brain is labeled to identify its origin and modality.

Question 17

Which of the following is a function of cerumen (earwax) in the external acoustic meatus?

Accepted Answer

It inhibits bacterial growth and protects the tympanic membrane.

Question 18

Which of the following best explains why olfactory cells are unique among neurons in the body?

Accepted Answer

They are directly exposed to the external environment and are replaced every 60 days.

Question 19

A person is unable to maintain balance when standing still but can walk in a straight line. Which structure is most likely impaired?

Accepted Answer

Maculae of the saccule and utricle

Question 20

Which of the following best describes the role of the basilar membrane in hearing?

Accepted Answer

It vibrates in response to sound, causing hair cells to move and generate action potentials.

Chapter 16: Sensory Systems – Anatomy & Physiology Study Notes

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