Question 1

Which connective tissue layer directly surrounds each individual axon within a peripheral nerve?

Accepted Answer

Endoneurium

Question 2

A patient presents with loss of sensation in the skin but retains motor function in the affected area. Which part of the spinal nerve is most likely damaged?

Accepted Answer

Dorsal root

Question 3

Which cranial nerve is responsible for controlling most of the parasympathetic nervous system, including heart rate and digestion?

Accepted Answer

Vagus nerve (X)

Question 4

If a nerve is cut and the epineurium is damaged, which of the following is most likely to occur?

Accepted Answer

The entire nerve bundle may lose structural integrity and function

Question 5

Which of the following best describes the arrangement of neurons in the autonomic nervous system?

Accepted Answer

Preganglionic neuron from CNS synapses with postganglionic neuron outside CNS

Question 6

During a 'fight-or-flight' response, which neurotransmitters are primarily released by the sympathetic division?

Accepted Answer

Epinephrine and norepinephrine

Question 7

Which equation best represents the total number of spinal nerves in the human body?

Accepted Answer

$N_{spinal} = 31$

Question 8

A patient with ALS (Amyotrophic Lateral Sclerosis) is most likely to experience which of the following symptoms?

Accepted Answer

Progressive muscle atrophy due to motor neuron degeneration

Question 9

Which of the following statements about spinal nerves is correct?

Accepted Answer

All spinal nerves are mixed, containing both sensory and motor fibers

Question 10

Which plexus is responsible for innervating the upper limb?

Accepted Answer

Brachial plexus

Question 11

In a reflex arc, which neuron type carries information from the sensory receptor to the spinal cord?

Accepted Answer

Afferent neuron

Question 12

Which of the following is a function of the parasympathetic division of the autonomic nervous system?

Accepted Answer

Decreases metabolism and promotes 'rest-and-digest' activities

Question 13

Which connective tissue layer encloses a bundle of axons (fascicle) within a nerve?

Accepted Answer

Perineurium

Question 14

A patient experiences referred pain in the left arm during a heart attack. This phenomenon is best explained by:

Accepted Answer

Convergence of sensory pathways in the spinal cord

Question 15

Which of the following best describes the difference between the sympathetic and parasympathetic divisions?

Accepted Answer

Sympathetic has short preganglionic neurons, parasympathetic has long preganglionic neurons

Question 16

Which formula represents the total number of cranial nerve pairs in humans?

Accepted Answer

$N_{cranial} = 12$

Question 17

Which of the following is NOT a function controlled by the vagus nerve?

Accepted Answer

Voluntary movement of skeletal muscle

Question 18

Which of the following best describes a mixed nerve?

Accepted Answer

Contains both sensory and motor fibers

Question 19

Which of the following is true regarding the organization of the peripheral nervous system?

Accepted Answer

Spinal nerves conduct impulses to and from the spinal cord

Question 20

A patient with damage to the dorsal root ganglion would most likely experience which of the following?

Accepted Answer

Loss of sensory input from the affected region

Peripheral Nervous System: Structure, Function, and Organization

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