Question 1

Which structure in the middle ear is responsible for equalizing air pressure between the middle ear and the nasopharynx, and what is a common consequence if this structure fails to function properly?

Accepted Answer

Pharyngotympanic tube; impaired vibration of the tympanic membrane

Question 2

Which fluid fills the cochlear duct (scala media) and is essential for the depolarization of hair cells during sound transduction?

Accepted Answer

Endolymph

Question 3

A patient presents with hearing loss after a perforated tympanic membrane. Which type of hearing loss is most likely, and why?

Accepted Answer

Conduction hearing loss; sound waves cannot efficiently reach the inner ear

Question 4

Which part of the inner ear detects rotational movements of the head, and what is the name of the receptor structure within it?

Accepted Answer

Semicircular ducts; crista ampullaris

Question 5

What is the correct order of the auditory pathway from the cochlear nerve to the primary auditory cortex?

Accepted Answer

Cochlear nuclei → superior olivary nucleus → inferior colliculus → medial geniculate nucleus → primary auditory cortex

Question 6

Which equation correctly represents the relationship between frequency, wavelength, and speed of sound?

Accepted Answer

$$v = f 	imes \lambda$$

Question 7

A person experiences dizziness and loss of balance when turning their head quickly. Which structure is most likely malfunctioning?

Accepted Answer

Ampulla of the semicircular ducts

Question 8

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

Accepted Answer

It vibrates in response to sound waves, allowing for frequency discrimination

Question 9

Which of the following scenarios would most likely result in sensorineural hearing loss?

Accepted Answer

Prolonged exposure to loud sounds damaging hair cells in the cochlea

Question 10

Which structure contains the macula and is responsible for detecting linear acceleration and head position relative to gravity?

Accepted Answer

Utricle and saccule

Question 11

What is the primary function of cerumen in the external auditory canal?

Accepted Answer

To waterproof and protect the tympanic membrane by trapping debris

Question 12

Which of the following best explains why high-frequency sounds are detected near the base of the cochlea?

Accepted Answer

The basilar membrane is narrow and stiff at the base, favoring high-frequency vibrations

Question 13

Which of the following is NOT a function of the stapedius muscle?

Accepted Answer

Increasing the amplitude of sound waves entering the cochlea

Question 14

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

Accepted Answer

It contains otoliths that increase its density, allowing detection of linear acceleration and head position

Question 15

A patient with a tumor affecting the cochlear branch of the vestibulocochlear nerve would most likely experience which type of hearing loss?

Accepted Answer

Neural hearing loss

Question 16

Which of the following is the correct sequence for the transmission of sound from the external environment to the inner ear?

Accepted Answer

Tympanic membrane → auditory ossicles → oval window → perilymph of scala vestibuli

Question 17

Which of the following best explains why motion sickness occurs?

Accepted Answer

The brain receives conflicting sensory information from the eyes and vestibular system

Question 18

Which of the following is a function of the spiral organ (organ of Corti)?

Accepted Answer

Transducing mechanical sound vibrations into action potentials

Question 19

Which of the following best describes the effect of bending stereocilia toward the tallest stereocilium in the cochlea?

Accepted Answer

Opens potassium ion channels, depolarizing the hair cell

Question 20

Which of the following is a real-world application of cochlear implants?

Accepted Answer

Bypassing damaged hair cells to directly stimulate the cochlear nerve

Hearing and Equilibrium: Anatomy & Physiology Study Guide

Guida di studio - Domande di pratica

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