Question 1

Which of the following best describes the role of the Peripheral Nervous System (PNS)?

Accepted Answer

It includes all neural structures outside the brain and spinal cord, providing links to and from the external environment.

Question 2

A patient is unable to feel pain or temperature changes on their skin. Which type of sensory receptor is most likely damaged?

Accepted Answer

Free nerve endings

Question 3

Which of the following correctly matches the receptor type with its stimulus?

Accepted Answer

Chemoreceptors – respond to chemicals such as smell and taste

Question 4

A person is able to distinguish between sweet and sour tastes. Which aspect of sensory perception does this demonstrate?

Accepted Answer

Quality discrimination

Question 5

Which connective tissue covering surrounds individual axons within a nerve?

Accepted Answer

Endoneurium

Question 6

If a patient has damage to their proprioceptors, which function would most likely be impaired?

Accepted Answer

Ability to detect muscle stretch and body position

Question 7

Which of the following is NOT a component of a reflex arc?

Accepted Answer

Cerebellum

Question 8

Which statement about nerve regeneration in the PNS is correct?

Accepted Answer

Schwann cells assist in regeneration by forming tubes and secreting growth factors.

Question 9

Which level of motor control is responsible for the precise start and stop of movements and blocking unwanted movements?

Accepted Answer

Precommand level

Question 10

A patient is unable to recognize a familiar melody. Which aspect of sensory perception is most likely affected?

Accepted Answer

Pattern recognition

Question 11

Which of the following best describes the function of the Golgi tendon organ?

Accepted Answer

Responds to degree of stretch in tendons

Question 12

Which type of nerve contains both sensory and motor fibers and carries impulses to and from the CNS?

Accepted Answer

Mixed nerve

Question 13

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

Accepted Answer

Merkel discs and Ruffini’s corpuscles adapt slowly.

Question 14

Which of the following is the correct order of neural integration in the somatosensory system?

Accepted Answer

Receptor level → Circuit level → Perceptual level

Question 15

A patient presents with loss of sensation in the limbs but retains motor function. Which type of nerve fibers are most likely damaged?

Accepted Answer

Somatic afferent fibers

Question 16

Which formula best represents the threshold needed to initiate a graded potential in a sensory neuron?

Accepted Answer

$$V_{m} \geq V_{threshold}$$

Question 17

Which of the following is a function of the segmental level of motor control?

Accepted Answer

Controls locomotion and specific, repeated motor activity via central pattern generators

Question 18

A patient is unable to identify the location of a stimulus applied to their skin. Which aspect of sensory perception is most likely impaired?

Accepted Answer

Spatial discrimination

Question 19

Which of the following is TRUE about the difference between sensation and perception?

Accepted Answer

Sensation is the awareness of changes, while perception is the conscious interpretation of those stimuli.

Question 20

Which of the following best describes the function of Meissner’s corpuscles?

Accepted Answer

Sense light touch

Peripheral Nervous System: Structure, Function, and Sensory Integration

Study Guide - Practice Questions