Question 1

Which of the following statements best explains why both smell and taste are considered chemical senses?

Accepted Answer

They both require chemicals to be dissolved in an aqueous solution to activate chemoreceptors.

Question 2

A patient presents with a loss of smell following a head injury. Which structure is most likely damaged, resulting in this symptom?

Accepted Answer

Olfactory nerves passing through the cribriform plate

Question 3

Which cranial nerve is primarily responsible for transmitting taste sensations from the anterior two-thirds of the tongue?

Accepted Answer

Facial nerve (VII)

Question 4

A person is unable to distinguish between sweet and salty tastes but can still detect sour and bitter. Which of the following is the most likely explanation?

Accepted Answer

Damage to specific taste receptor cells in the taste buds

Question 5

Which of the following best describes the process of sound amplification in the middle ear?

Accepted Answer

The tympanic membrane is about 20 times larger than the oval window, so vibrations are amplified about 20 times as they are transferred to the oval window.

Question 6

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

Accepted Answer

$$c = f 	imes \lambda$$

Question 7

A patient experiences vertigo, nausea, and nystagmus. Which part of the inner ear is most likely affected?

Accepted Answer

Semicircular canals and vestibule

Question 8

Which of the following best explains why foods taste bland when you have a blocked nose?

Accepted Answer

Olfaction contributes to about 80% of the sense of taste, so loss of smell greatly reduces flavor perception.

Question 9

Which of the following is a protective function of the dislike for sour and bitter tastes?

Accepted Answer

It helps prevent ingestion of spoiled or poisonous substances.

Question 10

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

Accepted Answer

It vibrates at specific locations depending on the frequency of sound, allowing for pitch discrimination.

Question 11

A person is exposed to loud music at 120 dB for several hours. Which of the following is the most likely consequence?

Accepted Answer

Severe hearing loss due to damage to cochlear hair cells

Question 12

Which of the following best explains the mechanism by which bending of stereocilia in cochlear hair cells leads to the generation of action potentials?

Accepted Answer

Bending toward the tallest stereocilia opens mechanically gated K$$^+$$ and Ca$$^{2+}$$ channels, causing depolarization and neurotransmitter release.

Question 13

Which of the following is NOT a function of the vestibular apparatus?

Accepted Answer

Detection of sound pitch

Question 14

A child with a history of frequent sore throats develops hearing loss. Which of the following is the most likely cause?

Accepted Answer

Otitis media causing inflammation of the middle ear

Question 15

Which of the following best describes the role of the maculae in the vestibule?

Accepted Answer

They detect changes in head position relative to gravity (static equilibrium).

Question 16

Which of the following is a likely effect of damage to the spiral organ (organ of Corti)?

Accepted Answer

Sensorineural deafness

Question 17

Which of the following best explains why presbycusis (age-related hearing loss) first affects high-pitch perception?

Accepted Answer

High-frequency sounds are detected by hair cells near the base of the cochlea, which are more susceptible to age-related damage.

Question 18

A patient with temporal lobe epilepsy experiences olfactory hallucinations before a seizure. What is the most likely explanation for this phenomenon?

Accepted Answer

Seizure activity in the olfactory cortex causes perception of odors that are not present.

Question 19

Which of the following best describes the pathway of auditory information from the cochlea to the primary auditory cortex?

Accepted Answer

Spiral ganglion → cochlear nuclei → superior olivary nucleus → lateral lemniscus → inferior colliculus → medial geniculate nucleus → primary auditory cortex

Question 20

Which of the following is a likely result of maternal rubella infection during the first trimester of pregnancy?

Accepted Answer

Sensorineural deafness in the child

Chemical Senses: Smell and Taste – Anatomy & Physiology Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard