Question 1

Which of the following best describes the initial step required for an odorant molecule to be detected by the olfactory system?

Accepted Answer

The odorant must dissolve in the mucus covering the olfactory epithelium.

Question 2

Which cranial nerves are primarily responsible for transmitting taste information from the tongue to the brain?

Accepted Answer

Facial nerve (VII) and Glossopharyngeal nerve (IX)

Question 3

Which of the following best explains why humans can distinguish thousands of different odors?

Accepted Answer

Each olfactory sensory neuron expresses only one type of olfactory receptor, and axons from neurons with the same receptor converge on the same glomerulus.

Question 4

Which taste sensation is primarily triggered by the presence of hydrogen ions ($$\mathrm{H^+}) in $$solution?

Accepted Answer

Sour

Question 5

A patient has lost the ability to taste on the anterior two-thirds of their tongue but can still taste at the back of the tongue and epiglottis. Which cranial nerve is most likely damaged?

Accepted Answer

Facial nerve (VII)

Question 6

Which of the following is a correct sequence for the olfactory pathway from odor detection to conscious perception?

Accepted Answer

Olfactory epithelium → Olfactory bulb → Olfactory tract → Olfactory cortex → Frontal lobe

Question 7

Which of the following best describes the mechanism of salty taste transduction?

Accepted Answer

Direct influx of $$\mathrm{Na^+}$$ ions causes depolarization of gustatory cells.

Question 8

Which structure in the olfactory pathway is responsible for amplifying, refining, and relaying olfactory signals?

Accepted Answer

Mitral cell

Question 9

A person is unable to detect bitter substances such as quinine and nicotine. Which of the following is the most likely explanation?

Accepted Answer

Loss of function in G protein gustducin-coupled receptors on gustatory cells.

Question 10

Which of the following statements about taste buds is TRUE?

Accepted Answer

Each taste bud contains both gustatory epithelial cells and basal epithelial cells.

Question 11

Which neurotransmitter is released by some gustatory cells in response to taste stimulation?

Accepted Answer

Serotonin

Question 12

Which of the following best explains why spicy foods can cause a burning sensation in the nose?

Accepted Answer

Spicy chemicals activate pain and temperature receptors in the nasal cavity.

Question 13

Which of the following is a function of amacrine granule cells in the olfactory bulb?

Accepted Answer

They release GABA to inhibit mitral cells, ensuring only highly excitatory impulses are transmitted.

Question 14

Which of the following best describes the role of taste in digestion?

Accepted Answer

Taste triggers reflexes that increase secretion of saliva and gastric juice.

Question 15

Which of the following papillae contain the most taste buds?

Accepted Answer

Fungiform, foliate, and vallate papillae

Question 16

A patient with a lesion in the insula would most likely have difficulty with which of the following?

Accepted Answer

Conscious perception of taste

Question 17

Which of the following best explains why taste likes and dislikes have homeostatic value?

Accepted Answer

They guide intake of beneficial and potentially harmful substances.

Question 18

Which of the following is the correct order for taste transduction for a salty stimulus?

Accepted Answer

Na+ influx → Depolarization → Neurotransmitter release → Action potential in sensory neuron

Question 19

Which of the following best describes the function of basal epithelial cells in taste buds?

Accepted Answer

They act as stem cells, dividing to replace gustatory epithelial cells every 7-10 days.

Question 20

Which of the following is a possible sixth taste sensation that may explain the human preference for fatty foods?

Accepted Answer

Detection of long-chain fatty acids from lipids

Taste and Smell: Anatomy & Physiology Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards