Question 1

Which structure within the inner ear is primarily responsible for detecting angular or rotary movements of the head?

Accepted Answer

Crista ampullaris in the semicircular canals

Question 2

What is the main function of the otoliths found in the vestibular apparatus?

Accepted Answer

To float in a gel and bend hair cells in response to head movements

Question 3

A patient experiences dizziness when spinning rapidly. Which part of the inner ear is most directly involved in detecting this motion?

Accepted Answer

Semicircular canals

Question 4

Which of the following best describes the pathway for transmitting information about static equilibrium to the brain?

Accepted Answer

Otoliths bend hair cells in the maculae, sending impulses via the vestibular nerve

Question 5

Which of the following is TRUE regarding the organ of Corti?

Accepted Answer

It contains hair cells on the basilar membrane that detect sound vibrations

Question 6

If the cupula in the semicircular canal is damaged, which sense would be most affected?

Accepted Answer

Detecting angular acceleration

Question 7

Which nerve transmits impulses from the hair cells of the cochlea to the auditory cortex?

Accepted Answer

Cochlear nerve

Question 8

A blow to the head damages the maculae in the vestibule. Which function is most likely to be impaired?

Accepted Answer

Awareness of head position relative to gravity

Question 9

Which of the following best explains why the semicircular canals are filled with endolymph?

Accepted Answer

To allow the cupula to move and stimulate hair cells during head rotation

Question 10

Which of the following is a correct sequence for the detection of sound in the cochlea?

Accepted Answer

Sound waves vibrate the tectorial membrane, which bends the hair cells, sending impulses via the cochlear nerve

Question 11

Which equation best represents the relationship between the force $$F$$ exerted by the otoliths and the acceleration $$a of $$the head, assuming the mass of the otoliths is $$m$$?

Accepted Answer

$$F = m 	imes a$$

Question 12

A patient has difficulty detecting both static and dynamic equilibrium. Which part of the inner ear is most likely damaged?

Accepted Answer

Vestibular apparatus

Question 13

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

Accepted Answer

It bends hair cells on the basilar membrane in response to sound vibrations

Question 14

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

Accepted Answer

Transmitting auditory information to the temporal lobe

Question 15

Which structure is directly responsible for detecting sound vibrations in the cochlea?

Accepted Answer

Hair cells on the basilar membrane

Question 16

If the endolymph in the semicircular canals becomes less viscous, what is the most likely effect on dynamic equilibrium?

Accepted Answer

The cupula will move more easily, possibly causing exaggerated responses to head movement

Question 17

Which of the following best explains why damage to the basilar membrane would affect hearing?

Accepted Answer

It would stop the hair cells from detecting sound vibrations

Question 18

Which part of the brain receives impulses from the cochlear nerve for sound perception?

Accepted Answer

Temporal lobe of the auditory cortex

Question 19

A patient with a lesion in the vestibular nerve would most likely experience which symptom?

Accepted Answer

Impaired sense of balance and equilibrium

Question 20

Which of the following best describes the difference between static and dynamic equilibrium?

Accepted Answer

Static equilibrium detects head position relative to gravity, while dynamic equilibrium detects angular head movements

Equilibrium and Hearing in the Inner Ear

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