Question 1

Which structure in the ear is primarily responsible for amplifying and transmitting vibrations from the tympanic membrane to the oval window?

Accepted Answer

Auditory ossicles

Question 2

A patient presents with difficulty equalizing ear pressure during flights, resulting in muffled hearing. Which structure is most likely not functioning properly?

Accepted Answer

Pharyngotympanic (auditory) tube

Question 3

Which fluid fills the membranous labyrinth of the inner ear and is essential for the excitation of hair cells?

Accepted Answer

Endolymph

Question 4

What is the main function of the maculae located in the utricle and saccule?

Accepted Answer

Monitoring static equilibrium and linear acceleration

Question 5

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

Accepted Answer

It vibrates at specific locations depending on the frequency of sound, allowing pitch discrimination.

Question 6

A sound wave with a frequency below the threshold of hearing will travel through which path in the cochlea?

Accepted Answer

Through the helicotrema and scala tympani to the round window

Question 7

Which of the following statements about the function of outer hair cells in the cochlea is correct?

Accepted Answer

They amplify the motion of the basilar membrane and protect inner hair cells from loud noises.

Question 8

If the tip links between stereocilia on hair cells are damaged, what is the most likely consequence?

Accepted Answer

Reduced ability to open mechanically gated ion channels, leading to impaired sound transduction

Question 9

Which equation correctly relates the speed of sound ($$v$$), its frequency ($$f$$), and its wavelength ($$\lambda$$)?

Accepted Answer

$$v = f 	imes \lambda$$

Question 10

A person is unable to detect high-pitched sounds but can hear low-pitched sounds. Which part of the basilar membrane is most likely damaged?

Accepted Answer

The base, where fibers are short and stiff

Question 11

Which of the following best explains why the brain can localize the direction of a sound?

Accepted Answer

By comparing the relative intensity and timing of sound waves reaching both ears

Question 12

Which structure is responsible for detecting rotational (angular) acceleration of the head?

Accepted Answer

Crista ampullaris in the semicircular canals

Question 13

What is the effect of bending stereocilia toward the kinocilium in the maculae?

Accepted Answer

It depolarizes the hair cell, increasing neurotransmitter release.

Question 14

Which of the following is true regarding the pathway of sound through the ear?

Accepted Answer

Sound waves cause the tympanic membrane to vibrate, which is transmitted via ossicles to the oval window.

Question 15

Which of the following best describes the function of the otoliths in the vestibular system?

Accepted Answer

They increase the inertia of the otolith membrane, enhancing detection of linear acceleration and gravity.

Question 16

A patient with damage to the vestibular nerve would most likely experience which of the following symptoms?

Accepted Answer

Impaired balance and equilibrium

Question 17

Which of the following is the correct sequence for the ascending auditory pathway from the cochlea to the primary auditory cortex?

Accepted Answer

Cochlear nuclei → Superior olivary nucleus → Inferior colliculus → Medial geniculate nucleus → Primary auditory cortex

Question 18

Which equation correctly expresses the relationship between sound intensity ($$I) $$and amplitude ($$A) $$for a sound wave?

Accepted Answer

$$I \propto A^2$

Question 19

Which of the following best explains why cochlear implants can restore hearing in some forms of deafness?

Accepted Answer

They convert sound energy into electrical signals that directly stimulate the cochlear nerve.

Question 20

Which of the following is NOT a function of the vestibular apparatus?

Accepted Answer

Transmitting auditory information to the brain

The Auditory System and Balance: Structure and Function of the Ear

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