Question 1

Which of the following best describes the function of the auricle in the external ear?

Accepted Answer

It funnels sound waves into the auditory canal.

Question 2

A patient presents with a blockage in the external acoustic meatus. Which of the following symptoms is most likely to occur as a direct result?

Accepted Answer

Impaired transmission of sound waves to the tympanic membrane.

Question 3

Which structure connects the middle ear to the nasopharynx and helps equalize pressure on both sides of the tympanic membrane?

Accepted Answer

Pharyngotympanic (auditory) tube

Question 4

The auditory ossicles are essential for hearing because they:

Accepted Answer

Transmit sound vibrations from the tympanic membrane to the inner ear.

Question 5

Which of the following correctly matches the ear region with its primary fluid?

Accepted Answer

Inner ear (bony labyrinth) – perilymph

Question 6

A patient with damage to the vestibulocochlear nerve would most likely experience:

Accepted Answer

Impaired hearing and balance.

Question 7

Which of the following is NOT a component of the bony labyrinth?

Accepted Answer

Pharyngotympanic tube

Question 8

The membranous labyrinth is filled with which type of fluid?

Accepted Answer

Endolymph

Question 9

Which of the following best explains why an infection in the nasopharynx can lead to a middle ear infection?

Accepted Answer

The pharyngotympanic tube connects the nasopharynx to the middle ear, allowing pathogens to travel between them.

Question 10

Which of the following is the correct sequence for the transmission of sound waves through the ear?

Accepted Answer

Auricle → external acoustic meatus → tympanic membrane → auditory ossicles → cochlea

Question 11

Which of the following statements about the auditory ossicles is TRUE?

Accepted Answer

They consist of the malleus, incus, and stapes.

Question 12

A patient with a ruptured tympanic membrane would most likely have difficulty with which of the following?

Accepted Answer

Transmitting sound vibrations to the auditory ossicles

Question 13

Which of the following best describes the role of the vestibulocochlear nerve?

Accepted Answer

It transmits auditory and equilibrium information from the inner ear to the brain.

Question 14

Which of the following structures is responsible for producing earwax?

Accepted Answer

Ceruminous glands in the external acoustic meatus

Question 15

A swimmer experiences dizziness after water enters the ear and disrupts the fluid in the semicircular canals. Which fluid is most likely affected?

Accepted Answer

Endolymph

Question 16

Which of the following is a function of the vestibule in the inner ear?

Accepted Answer

Detecting changes in head position and linear acceleration

Question 17

If the perilymph in the bony labyrinth were replaced with air, which of the following would most likely occur?

Accepted Answer

Transmission of sound vibrations would be severely impaired.

Question 18

Which of the following best explains why the membranous labyrinth is filled with potassium-rich endolymph?

Accepted Answer

It is essential for the generation of electrical signals in hair cells.

Question 19

A child with chronic otitis media (middle ear infection) is at risk for which of the following complications if the infection spreads to the inner ear?

Accepted Answer

Hearing loss and balance disturbances due to damage of the cochlea and vestibular apparatus.

Question 20

Which of the following is the correct formula for the speed of sound ($$v) in a $$medium, which is relevant to how sound travels through the ear?

Accepted Answer

$$v = \sqrt{\frac{B}{\rho}}$$

The Special Senses: The Ear – Structure and Function ( Lab study guide)

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