Question 1

Which of the following best describes the function of a sensory receptor in the peripheral nervous system?

Accepted Answer

It detects specific stimuli and converts them into electrical impulses.

Question 2

A patient is unable to feel pain in their left hand after a nerve injury. Which type of sensory receptor is most likely damaged?

Accepted Answer

Nociceptors

Question 3

Which equation correctly represents the relationship between stimulus intensity ($$I) $$and receptor potential ($$V) in a $$sensory neuron, assuming a linear response?

Accepted Answer

$$V = kI$$

Question 4

Which of the following best describes the structure of a typical spinal nerve?

Accepted Answer

It contains both sensory and motor fibers, joining at the spinal nerve trunk.

Question 5

Which statement about dorsal root ganglia is correct?

Accepted Answer

They contain cell bodies of sensory neurons.

Question 6

A patient presents with loss of sensation but preserved motor function in the right leg. Which part of the spinal nerve is most likely affected?

Accepted Answer

Dorsal root

Question 7

Which of the following is NOT a function of the peripheral nervous system?

Accepted Answer

Integrating complex cognitive functions

Question 8

Which type of nerve fiber would be responsible for transmitting information about muscle stretch to the spinal cord?

Accepted Answer

Somatic sensory fibers

Question 9

If the ventral root of a spinal nerve is severed, which function will be most affected?

Accepted Answer

Motor control of skeletal muscles

Question 10

Which of the following best describes the difference between somatic and autonomic nerves?

Accepted Answer

Somatic nerves control voluntary muscle movement; autonomic nerves regulate involuntary functions.

Question 11

Which equation would you use to calculate the conduction velocity ($$v) of a $$nerve fiber given the distance ($$d) $$and time ($$t) it $$takes for an impulse to travel?

Accepted Answer

$$v = \frac{d}{t}$$

Question 12

A patient has damage to the autonomic nerves innervating the heart. Which symptom is most likely?

Accepted Answer

Irregular heart rate

Question 13

Which of the following best describes the branching pattern of a typical spinal nerve after it exits the vertebral column?

Accepted Answer

It divides into dorsal and ventral rami, each serving different regions.

Question 14

Which type of sensory receptor is primarily responsible for detecting changes in temperature?

Accepted Answer

Thermoreceptors

Question 15

Which of the following is a correct description of the function of the dorsal ramus of a spinal nerve?

Accepted Answer

It innervates the muscles and skin of the back.

Question 16

Which equation would you use to estimate the total number of sensory neurons ($$N) in a $$dorsal root ganglion if you know the average number per ganglion ($$n) $$and the total number of ganglia ($$g$$)?

Accepted Answer

$$N = n 	imes g$$

Question 17

Which of the following best explains why damage to the peripheral nervous system can result in loss of both sensation and movement?

Accepted Answer

Peripheral nerves contain both sensory and motor fibers.

Question 18

A patient is unable to sweat on one side of their body after a nerve injury. Which division of the peripheral nervous system is most likely affected?

Accepted Answer

Autonomic division

Question 19

Which of the following is a correct statement about the function of the ventral ramus of a spinal nerve?

Accepted Answer

It innervates the anterior and lateral trunk and limbs.

Question 20

Which of the following best describes the role of the peripheral nervous system in a reflex arc?

Accepted Answer

It transmits sensory input to the central nervous system and motor output to effectors.

Peripheral Nervous System: Structure and Function

Study Guide - Practice Questions

Study Guide - Flashcards