Question 1

Which of the following best describes the main function of the peripheral nervous system (PNS)?

Accepted Answer

To connect the central nervous system (CNS) to limbs and organs, serving as a communication relay.

Question 2

A patient presents with loss of sensation in the skin overlying the lateral forearm. Which nerve is most likely affected?

Accepted Answer

Musculocutaneous nerve

Question 3

Which type of sensory receptor is primarily responsible for detecting changes in muscle length during a stretch reflex?

Accepted Answer

Muscle spindles

Question 4

A person accidentally touches a hot stove and immediately withdraws their hand. Which of the following best describes the neural pathway involved in this response?

Accepted Answer

An inborn reflex arc involving a receptor, sensory neuron, integration center, motor neuron, and effector

Question 5

Which cranial nerve is responsible for transmitting auditory and equilibrium information from the inner ear to the brain?

Accepted Answer

CN VIII (Vestibulocochlear Nerve)

Question 6

A patient with a herniated lumbar disc develops footdrop. Which nerve is most likely compressed?

Accepted Answer

Common fibular (peroneal) nerve

Question 7

Which of the following best explains why the peripheral nervous system (PNS) has a greater capacity for axonal regeneration than the central nervous system (CNS)?

Accepted Answer

Schwann cells in the PNS form regeneration tubes and secrete growth factors.

Question 8

Which of the following is a correct sequence for the organization of the brachial plexus from proximal to distal?

Accepted Answer

Ventral Rami → Trunks → Divisions → Cords

Question 9

A patient is unable to abduct their arm at the shoulder and has loss of sensation over the deltoid region. Which nerve is most likely damaged?

Accepted Answer

Axillary nerve

Question 10

Which of the following best describes referred pain?

Accepted Answer

Pain that is perceived in an area different from the site of the actual stimulus due to convergence of neural pathways

Question 11

Which nerve is primarily responsible for the motor control of the diaphragm and is essential for breathing?

Accepted Answer

Phrenic nerve

Question 12

Which of the following best describes the function of nociceptors?

Accepted Answer

Respond to potentially damaging stimuli that result in pain

Question 13

A patient presents with 'wrist drop' after falling asleep with their arm draped over a chair. Which nerve is most likely affected?

Accepted Answer

Radial nerve

Question 14

Which of the following is TRUE regarding dermatomes?

Accepted Answer

They are regions of skin innervated by the dorsal root of a single spinal nerve.

Question 15

Which of the following best describes the role of the integration center in a reflex arc?

Accepted Answer

It processes sensory information and determines the appropriate response.

Question 16

Which cranial nerve is responsible for most of the parasympathetic output to the thoracic and abdominal organs?

Accepted Answer

CN X (Vagus Nerve)

Question 17

A patient is unable to flex their fingers and has difficulty with the pincer grasp. Which nerve is most likely involved?

Accepted Answer

Median nerve

Question 18

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

Accepted Answer

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

Question 19

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

Accepted Answer

Receptor level → Circuit level → Perceptual level

Question 20

A patient presents with loss of adduction of the thigh and sensory loss over the medial thigh. Which nerve is most likely damaged?

Accepted Answer

Obturator nerve

The Peripheral Nervous System and Reflex Activity: Study Notes

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드