$$V_{RP} = V_{max} \times e$$^{-t/\tau}$$

Question 1

Which of the following best describes the difference between sensation and perception?

Accepted Answer

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

Question 2

Which cranial nerve is responsible for vision and contains only sensory fibers?

Accepted Answer

II Optic

Question 3

A patient presents with loss of smell. Which cranial nerve is most likely damaged?

Accepted Answer

I Olfactory

Question 4

Which of the following best defines a plexus in the peripheral nervous system?

Accepted Answer

A network of intersecting nerves

Question 5

Which nerve is part of the brachial plexus and is responsible for innervating the muscles of the forearm?

Accepted Answer

Median nerve

Question 6

What is the correct order of the components in a reflex arc?

Accepted Answer

Receptor, Sensory neuron, Integration center, Motor neuron, Effector

Question 7

Which of the following is TRUE about nerve regeneration in the peripheral nervous system?

Accepted Answer

Schwann cells play a key role in guiding axon regrowth.

Question 8

Which cranial nerve has both sensory and motor functions and is involved in facial expression?

Accepted Answer

VII Facial

Question 9

Which of the following best describes referred pain?

Accepted Answer

Pain felt in a different area from where the stimulus originates.

Question 10

Which equation best represents the relationship between stimulus intensity and receptor potential in a phasic receptor?

Accepted Answer

$$V_{RP} = V_{max} 	imes e$$^{-t/	au}$$

Question 11

Which of the following is NOT a function of the parasympathetic fibers (PS*) in cranial nerves?

Accepted Answer

Initiating voluntary muscle movement

Question 12

A patient exhibits Babinski’s sign. What does this indicate about their nervous system?

Accepted Answer

Possible damage to the corticospinal tract

Question 13

Which spinal nerve region is associated with the sciatic nerve?

Accepted Answer

Sacral

Question 14

Which of the following best defines a dermatome?

Accepted Answer

A region of skin innervated by a single spinal nerve

Question 15

Which reflex is responsible for protecting the body from injury by causing rapid withdrawal from a painful stimulus?

Accepted Answer

Flexor (withdrawal) reflex

Question 16

Which cranial nerve is involved in hearing and balance?

Accepted Answer

VIII Vestibulocochlear

Question 17

Which of the following is an example of a learned reflex?

Accepted Answer

Driving a car and braking when seeing a red light

Question 18

Which covering surrounds individual axons within a peripheral nerve?

Accepted Answer

Endoneurium

Question 19

Which cranial nerve is responsible for tongue movement and contains only motor fibers?

Accepted Answer

XII Hypoglossal

Question 20

Which equation best describes the conduction velocity ($$v) of a $$nerve fiber as a function of its diameter ($$d) $$and myelination?

Accepted Answer

$$v = k 	imes d 	imes m$$

Peripheral Nervous System (PNS): Structure, Function, and Reflexes

Study Guide - Practice Questions