15. The Special Senses

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

c. The auditory canal is separated from the middle ear by the round window.

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

e. The semicircular ducts are connected to the utricle, and the cochlear duct is continuous with the saccule.

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

d. The cochlear duct is filled with perilymph.

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

f. The spiral organ is located in the scala tympani.

Explain how sounds of different frequencies are detected in the cochlea.

How do the hair cells of the crista ampullaris detect rotation of the head?

The macula in the utricle detects:

a. rotation of the head to the right.

b. very low-frequency sound waves that we can feel but not hear.

c. tilting of the head to one side.

d. linear acceleration of the head in a vertical plane.

True or false: Hair cells in the spiral organ will depolarize or hyperpolarize, depending on the direction in which the stereocilia are bent.

Which of the following is not part of the auditory pathway in the CNS?

a. Superior temporal lobe

b. Superior colliculus

c. Medial geniculate nucleus

d. Nuclei in the pons

e. Cochlear nuclei

Fill in the blanks: In the ampulla of a semicircular duct, the hair cells are located in the_____and their stereocilia and kinocilium are embedded in the______.

Stimuli from the inner ear regarding head movement and position are sent to all of the following except the:

a. vestibular nuclei.

b. oculomotor nucleus.

c. parietal lobe.

d. cerebellum.

e. trigeminal nucleus.

Explain what would happen to your sense of smell if there were no basal cells present in the olfactory epithelium.

In which direction would you be unable to move your right eye if your right abducens nerve were damaged?

Following a stroke, a patient lost vision in the left visual field. Name several structures in the brain that could have been damaged by the stroke to have caused this vision loss. Be specific as to right or left side.

Mr. Spencer suffers loss of taste sensation. Tests reveal that his taste buds and salivary glands are functional. What other structures might be impaired that would explain his loss of taste?