Question 1

Which of the following best describes the process of sensory transduction at the receptor level?

Accepted Answer

Conversion of stimulus energy into a graded potential, which must reach threshold in the first-order sensory neuron.

Question 2

A patient is unable to precisely localize a light touch stimulus on their forearm. Which property of sensory perception is most likely impaired?

Accepted Answer

Spatial discrimination

Question 3

Which pathway is primarily responsible for transmitting discriminative touch and proprioceptive information to the brain?

Accepted Answer

Dorsal column-medial lemniscal pathway

Question 4

What is the main difference between phasic and tonic sensory receptors?

Accepted Answer

Phasic receptors adapt quickly to constant stimuli, while tonic receptors provide sustained responses with little adaptation.

Question 5

Which neurotransmitters are involved in the transmission of pain signals from nociceptors?

Accepted Answer

Glutamate and substance P

Question 6

A person experiences pain in their left arm during a heart attack. This is an example of:

Accepted Answer

Referred pain

Question 7

Which cranial nerve carries taste information from the anterior two-thirds of the tongue?

Accepted Answer

Facial nerve (VII)

Question 8

Which taste modality is most sensitive to protect against ingestion of toxic substances?

Accepted Answer

Bitter

Question 9

What is the correct order of neurons in the ascending somatosensory pathway?

Accepted Answer

First-order neuron → Second-order neuron → Third-order neuron

Question 10

Which of the following mechanisms is responsible for the depolarization of gustatory epithelial cells in response to salty foods?

Accepted Answer

Influx of Na$$^+$$ through channels

Question 11

Which property of sensory perception allows you to recognize a familiar melody or face?

Accepted Answer

Pattern recognition

Question 12

Which of the following statements about olfactory receptors is TRUE?

Accepted Answer

Each olfactory receptor cell expresses only one type of odorant receptor.

Question 13

Which pathway carries information about muscle or tendon stretch to the cerebellum and does NOT decussate?

Accepted Answer

Spinocerebellar pathway

Question 14

Which of the following is an example of central adaptation?

Accepted Answer

Reduced sensitivity due to changes in brain nuclei along the neural pathway.

Question 15

Which of the following equations correctly represents the relationship between stimulus intensity and action potential frequency?

Accepted Answer

$$f \propto I_{stimulus}$$

Question 16

Which neurotransmitters are released by descending pain-suppressing pathways to block pain signals in the spinal cord?

Accepted Answer

Endorphins and enkephalins

Question 17

Which of the following is TRUE regarding the adaptation of taste receptors?

Accepted Answer

Taste receptors adapt rapidly, with partial adaptation in 3-5 seconds and complete adaptation in 1-5 minutes.

Question 18

Which of the following best explains why actual taste is a small component of the total experience of eating?

Accepted Answer

Most of what we attribute to taste is actually smell, accounting for about 80% of the experience.

Question 19

Which of the following statements about pain threshold and pain tolerance is correct?

Accepted Answer

Pain threshold is the same for everyone, but pain tolerance varies among individuals.

Neuroanatomy & Neurophysiology: Sensory Processing, Pain, and Special Senses (Taste & Smell)

Study Guide - Practice Questions