Question 1

Which of the following best describes the process of sensory transduction in a receptor cell?

Accepted Answer

The conversion of a stimulus energy (such as light, heat, or sound) into a nerve signal.

Question 2

A patient presents with a loss of fine two-point discrimination in their fingertips. Which of the following best explains this deficit?

Accepted Answer

The receptive fields in the fingertips are small, allowing for high resolution and fine discrimination.

Question 3

Which of the following receptor types is responsible for detecting changes in muscle tension and joint motion?

Accepted Answer

Proprioceptors

Question 4

A person is exposed to a prolonged, unchanging stimulus and gradually becomes less aware of it. Which receptor property is responsible for this phenomenon?

Accepted Answer

Sensory adaptation

Question 5

Which of the following best explains why heart pain is often felt in the left shoulder or arm?

Accepted Answer

The brain cannot distinguish the source of pain due to convergence of neural pathways (referred pain).

Question 6

Which of the following is TRUE regarding the projection pathway for pain from the body below the neck?

Accepted Answer

Pain signals ascend via the spinothalamic tract to the thalamus before reaching the cortex.

Question 7

Which of the following best describes the function of endogenous opioids in the central nervous system?

Accepted Answer

They act as neuromodulators that block pain and produce pleasure.

Question 8

Which cranial nerve is primarily responsible for carrying taste sensations from the anterior two-thirds of the tongue?

Accepted Answer

Facial nerve (CN VII)

Question 9

Which of the following statements about olfactory transduction is correct?

Accepted Answer

Odorants bind to G protein-coupled receptors, activating a cAMP second-messenger system.

Question 10

A patient with sensorineural deafness most likely has damage to which of the following?

Accepted Answer

Hair cells of the cochlea or auditory nerve

Question 11

Which structure in the inner ear is primarily responsible for detecting rotational (angular) acceleration?

Accepted Answer

Semicircular ducts

Question 12

Which of the following best explains why the fovea centralis provides the highest visual acuity?

Accepted Answer

It contains only cones with little or no neuronal convergence.

Question 13

Which of the following is the correct sequence for the visual projection pathway from the retina to the primary visual cortex?

Accepted Answer

Retina → optic nerve → optic chiasm → optic tract → lateral geniculate nucleus → optic radiation → primary visual cortex

Question 14

Which of the following best describes the effect of light on rhodopsin in rod cells?

Accepted Answer

Light causes rhodopsin to convert from cis-retinal to trans-retinal, leading to bleaching and decreased glutamate release.

Question 15

Which of the following is a function of the cochlear outer hair cells?

Accepted Answer

They adjust the response of the cochlea to different frequencies and increase auditory precision.

Question 16

A person with red-green color blindness most likely lacks which of the following?

Accepted Answer

L or M cones

Question 17

Which of the following best explains the near response of the eye when focusing on a close object?

Accepted Answer

The lens becomes more convex, the pupils constrict, and the eyes converge.

Question 18

Which of the following best describes the function of the otolithic membrane in the vestibular system?

Accepted Answer

It bends stereocilia of hair cells in response to gravity and linear acceleration.

Question 19

Which of the following is TRUE regarding the difference between phasic and tonic receptors?

Accepted Answer

Phasic receptors adapt quickly and signal changes in stimulus, while tonic receptors adapt slowly and signal ongoing stimulus.

Question 20

Which of the following best explains why rubbing a painful area can reduce the sensation of pain?

Accepted Answer

Rubbing stimulates mechanoreceptors, which activate inhibitory interneurons in the spinal cord, reducing pain transmission.

Study Guide: Sense Organs and Special Senses in Anatomy & Physiology CH 16

Study Guide - Practice Questions

Study Guide - Flashcards