Question 1

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

Accepted Answer

Conducts sensory and motor impulses between the central nervous system and the rest of the body.

Question 2

A receptor located in the wall of a blood vessel that responds to blood pressure is best classified as:

Accepted Answer

Interoceptor and mechanoreceptor

Question 3

Which cranial nerve is primarily responsible for transmitting action potentials from the retina of the eye to the brain?

Accepted Answer

Optic nerve (II)

Question 4

In the process of nerve regeneration in the peripheral nervous system, which cells form a regeneration tube that guides the regenerating axon sprouts?

Accepted Answer

Schwann cells

Question 5

Which of the following reflexes is monosynaptic and ipsilateral?

Accepted Answer

Stretch reflex

Question 6

A patient presents with loss of sensation in a specific region of skin. This region is best described as a:

Accepted Answer

Dermatome

Question 7

Which of the following best characterizes the dorsal root of a spinal nerve?

Accepted Answer

Carries sensory information only

Question 8

Which structure is the key center for sensorimotor integration and control?

Accepted Answer

Cerebellum

Question 9

The conversion of stimulus energy into the energy of a graded potential is called:

Accepted Answer

Transduction

Question 10

Which of the following reflexes causes muscle relaxation in response to increased muscle tension?

Accepted Answer

Tendon reflex

Question 11

A receptor in the skin that responds to a hot surface is best classified as:

Accepted Answer

Exteroceptor and thermoreceptor

Question 12

Which of the following cranial nerves has cutaneous branches?

Accepted Answer

Trigeminal

Question 13

Which branches of spinal nerves form plexuses?

Accepted Answer

Ventral rami

Question 14

Which of the following best describes the role of reciprocal inhibition during a spinal reflex?

Accepted Answer

It inhibits the antagonist muscle, allowing the agonist muscle to contract.

Question 15

Which of the following reflexes is contralateral and important for maintaining balance during a withdrawal reflex?

Accepted Answer

Crossed-extensor reflex

Question 16

Which of the following is the correct Roman numeral for cranial nerve IX?

Accepted Answer

IX

Question 17

Which of the following best describes a receptor located in a skeletal muscle that responds to muscle stretch?

Accepted Answer

Proprioceptor and mechanoreceptor

Question 18

Which of the following structures contains the cell bodies of sensory neurons?

Accepted Answer

Dorsal root ganglia

Question 19

Which equation best represents the relationship between stimulus intensity and action potential frequency?

Accepted Answer

$$ f = k \cdot I $$ where $$f is $$frequency, $$I is $$intensity, and $$k is a $$proportionality constant.

Question 20

Which of the following is a real-life example of referred pain?

Accepted Answer

Pain felt in the left arm during a heart attack.

Peripheral Nervous System & Reflex Activity Study Guide

Study Guide - Practice Questions

Study Guide - Flashcards