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2:50 2:50Which of the following statements is true regarding gustatory cells?
a. They have microvilli that project into the taste pore.
b. There are only 10–20 gustatory cells in a typical taste bud.
c. They have a lifespan of approximately 6 months.
d. Some form synapses with neurons that give rise to the trigeminal nerve.
Match the taste with the chemical substance that produces it.
___Sweet
___Sour
___Salty
___Bitter
___Umami
a. Many alkaloids
b. Sucrose
c. Glutamate
d. Sodium ions
e. Hydrogen ions
Suppose the round window in your middle ear became very stiff. What effect would this have on hearing, and why?
If severe congestion from a cold prevented your pharyngotympanic tube from opening, what could happen to your tympanic membrane? Explain your answer.
Your 60-year-old patient, Mr. Guster, has Bell's palsy, which causes dysfunction of those portions of the facial nerve that control muscles of facial expression. He is surprised when you tell him to tape the eyelids of his right eye closed at night to prevent dryness. Why might Bell's palsy cause dryness of the eye on the affected side?
Which of the following cranial nerves is not involved in the gustatory sense?
a. Vagus nerve (X)
b. Hypoglossal nerve (XII)
c. Facial nerve (VII)
d. Glossopharyngeal nerve (IX)
