Question 1

Which of the following best describes the process of sensory transduction in the special senses?

Accepted Answer

Conversion of a physical or chemical stimulus into an action potential that can be interpreted by the brain.

Question 2

A patient presents with gradual loss of peripheral vision and increased intraocular pressure. Which condition is most likely responsible, and what is the underlying mechanism?

Accepted Answer

Glaucoma; buildup of aqueous humor increases intraocular pressure, compressing the retina and optic nerve.

Question 3

Which cranial nerves are responsible for transmitting taste stimuli from the tongue to the CNS?

Accepted Answer

Facial (VII), Glossopharyngeal (IX), and Vagus (X) nerves

Question 4

Which of the following best explains why humans are most sensitive to bitter tastes?

Accepted Answer

Many bitter compounds are toxic, so heightened sensitivity serves as a protective function.

Question 5

A person with red-green color blindness is unable to distinguish between red and green hues. What is the most likely cause?

Accepted Answer

A defective gene for one or more cone pigments, causing the cones to absorb the wrong wavelength of light.

Question 6

Which of the following best describes the role of the ciliary body in accommodation for near vision?

Accepted Answer

Contraction of the ciliary muscle decreases tension on the suspensory ligaments, allowing the lens to round up.

Question 7

Which of the following equations correctly represents the relationship between frequency, wavelength, and the speed of sound in air?

Accepted Answer

$$v = f 	imes \lambda$$

Question 8

A patient experiences a loss of stereoscopic vision after an injury. Which of the following best explains the consequence?

Accepted Answer

The patient loses depth perception because the brain can no longer compare images from both eyes.

Question 9

Which structure in the inner ear is primarily responsible for detecting rotational movements of the head?

Accepted Answer

Semicircular ducts within the semicircular canals

Question 10

Which of the following best describes the sequence of events in the transduction of sound in the cochlea?

Accepted Answer

Vibration of the basilar membrane bends stereocilia, opening potassium channels, depolarizing hair cells, and triggering action potentials in the cochlear nerve.

Question 11

A patient with sensorineural hearing loss is most likely to have damage in which of the following?

Accepted Answer

Hair cells of the cochlea or the cochlear nerve

Question 12

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

Accepted Answer

It contains a high density of cones and each ganglion cell receives input from only one photoreceptor.

Question 13

Which of the following is a correct statement about the olfactory pathway?

Accepted Answer

Olfactory stimuli travel directly to the primary olfactory cortex without synapsing in the thalamus.

Question 14

Which of the following best describes the effect of light on rod photoreceptors?

Accepted Answer

Light causes cis-retinal to change to trans-retinal, leading to hyperpolarization of the photoreceptor cell.

Question 15

A person is riding in an elevator and feels the sensation of moving upward. Which structure is primarily responsible for detecting this linear acceleration?

Accepted Answer

Saccule in the vestibule

Question 16

Which of the following best explains the cause of motion sickness?

Accepted Answer

Mismatched sensory information from the eyes and vestibular system

Question 17

Which of the following is true regarding the difference between general and special senses?

Accepted Answer

Special senses use specialized receptor cells and are confined to the head, while general senses use sensory neuron endings and are distributed throughout the body.

Question 18

Which of the following best describes the function of the lacrimal apparatus?

Accepted Answer

It produces and drains tears to lubricate and protect the eye.

Question 19

Which of the following best describes the effect of the parasympathetic nervous system on the pupil?

Accepted Answer

It stimulates the pupillary sphincter muscle to constrict the pupil.

Study Guide: The Special Senses in Human Anatomy & Physiology

Study Guide - Practice Questions

Study Guide - Flashcards