Question 1

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

Accepted Answer

The network of nerves and ganglia outside the brain and spinal cord that connects the central nervous system to limbs and organs.

Question 2

Which of the following is NOT a general sensory receptor type classified by stimulus detected?

Accepted Answer

Photoreceptor

Question 3

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

Accepted Answer

Receptor, sensory neuron, integration center, motor neuron, effector

Question 4

A patient touches a hot stove and immediately withdraws their hand. Which type of reflex is this, and what is the primary receptor involved?

Accepted Answer

Somatic reflex; nociceptor

Question 5

Which connective tissue layer surrounds individual nerve fibers within a peripheral nerve?

Accepted Answer

Endoneurium

Question 6

If a patient loses sensation in a specific region of skin, which term best describes this area?

Accepted Answer

Dermatome

Question 7

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

Accepted Answer

A cluster of neuron cell bodies located outside the central nervous system.

Question 8

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 9

A patient presents with loss of motor function but intact sensory function in a limb. Which component of the reflex arc is most likely damaged?

Accepted Answer

Motor neuron

Question 10

Which of the following best describes a 'plexus' in the context of the peripheral nervous system?

Accepted Answer

A network of intersecting nerves that serve a particular region of the body.

Question 11

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

Accepted Answer

Integration of sensory information

Question 12

Which type of receptor is primarily responsible for detecting changes in blood pressure?

Accepted Answer

Baroreceptor

Question 13

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 PNS, while a tract is a bundle of axons in the CNS.

Question 14

Which of the following is a correct example of a general sensory receptor classified by body location?

Accepted Answer

Exteroceptor detecting touch on the skin

Question 15

A patient is unable to sense limb position after a spinal injury. Which receptor type is most likely affected?

Accepted Answer

Proprioceptor

Question 16

Which of the following best describes the role of the perineurium?

Accepted Answer

It surrounds bundles of nerve fibers (fascicles) within a nerve.

Question 17

Which of the following is a correct statement about the integration center in a reflex arc?

Accepted Answer

It is typically located in the spinal cord or brainstem and processes incoming sensory information.

Question 18

Which of the following equations best represents the conduction velocity ($$v) of a $$nerve fiber as a function of its diameter ($$d$$), assuming myelination and a proportional relationship?

Accepted Answer

$$v = k d$$

Question 19

Which of the following is NOT one of the three levels of sensory integration?

Accepted Answer

Effector level

Question 20

A patient is unable to feel pain in their left arm after a nerve injury. Which type of receptor and sensory pathway are most likely affected?

Accepted Answer

Nociceptor; spinothalamic tract

Peripheral Nervous System: Study Guide and Key Concepts

Study Guide - Practice Questions

Study Guide - Flashcards