Question 1

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

Accepted Answer

It detects changes in the environment and converts them into electrical signals.

Question 2

A patient is unable to feel pain in their right hand but can still move it. Which type of nerve fiber is most likely damaged?

Accepted Answer

Somatic sensory fibers

Question 3

Which of the following best describes the difference between a nerve and a tract?

Accepted Answer

A nerve is a bundle of axons in the peripheral nervous system, while a tract is a bundle of axons in the central nervous system.

Question 4

Which of the following is TRUE regarding the structure of a typical spinal nerve?

Accepted Answer

It contains both sensory and motor fibers.

Question 5

Which of the following best describes the function of the dorsal root ganglion?

Accepted Answer

It contains the cell bodies of sensory neurons.

Question 6

A patient presents with loss of voluntary muscle control but intact sensation in the lower limbs. Which part of the spinal nerve is most likely affected?

Accepted Answer

Ventral root

Question 7

Which of the following is a correct classification of a mechanoreceptor?

Accepted Answer

A receptor that detects pressure or stretch

Question 8

Which of the following best describes the pathway of a sensory signal from the skin to the spinal cord?

Accepted Answer

Sensory neuron → dorsal root → spinal cord

Question 9

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

Accepted Answer

Integrating sensory input and coordinating motor output

Question 10

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

Accepted Answer

Somatic motor fibers innervate skeletal muscle, while autonomic motor fibers innervate cardiac and smooth muscle.

Question 11

Which of the following is an example of a chemoreceptor function in the peripheral nervous system?

Accepted Answer

Sensing changes in blood pH

Question 12

A person accidentally touches a hot stove and quickly withdraws their hand. Which type of receptor is primarily responsible for detecting this stimulus?

Accepted Answer

Nociceptor

Question 13

Which of the following best describes the function of the ventral root of a spinal nerve?

Accepted Answer

It carries motor commands away from the spinal cord.

Question 14

Which of the following is a correct description of a mixed nerve?

Accepted Answer

A nerve that contains both sensory and motor fibers

Question 15

Which of the following best describes the role of the peripheral nervous system in homeostasis?

Accepted Answer

It transmits information between the central nervous system and the rest of the body.

Question 16

Which of the following is the correct sequence for the transmission of a sensory signal from the skin to the brain?

Accepted Answer

Receptor → sensory neuron → dorsal root → spinal cord → brain

Question 17

Which of the following best describes the function of the autonomic nervous system?

Accepted Answer

It regulates involuntary functions such as heart rate and digestion.

Question 18

Which of the following is a function of the somatic nervous system?

Accepted Answer

Controlling voluntary muscle movements

Question 19

Which of the following best describes the difference between a receptor field and a receptive field?

Accepted Answer

A receptor field is the area monitored by a single sensory neuron, while a receptive field is the area monitored by all neurons in a region.

Question 20

Which of the following best describes the function 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

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