Q: Which of the following equations correctly represents the relationship between the number of cranial and spinal nerves in the peripheral nervous system?

$$\text{Total PNS nerves} = 12 + 31$$

Question 1

Which of the following best describes the function of the myelin sheath in the nervous system?

Accepted Answer

It increases the velocity of nerve impulse transmission by acting as an insulator.

Question 2

A patient presents with loss of voluntary movement and impaired memory. Which division of the brain is most likely affected?

Accepted Answer

Cerebrum

Question 3

Which of the following is TRUE regarding sensory neurons?

Accepted Answer

They transmit sensory information to the CNS and are referred to as afferent nerves.

Question 4

The all-or-none principle in nerve impulse transmission states that:

Accepted Answer

A nerve impulse is transmitted only if the stimulus reaches a minimum threshold, producing a maximum impulse.

Question 5

Which structure connects the two cerebral hemispheres and allows information to pass between them?

Accepted Answer

Corpus callosum

Question 6

A patient with damage to the occipital lobe would most likely experience problems with:

Accepted Answer

Vision interpretation

Question 7

Which of the following is a function of the hypothalamus?

Accepted Answer

Regulation of body temperature and metabolic activities

Question 8

The sympathetic division of the autonomic nervous system is responsible for:

Accepted Answer

Preparing the body for fight-or-flight responses

Question 9

Which of the following best describes the function of the medulla oblongata?

Accepted Answer

Regulation of breathing, heartbeat, and blood pressure

Question 10

A nerve is defined as:

Accepted Answer

A collection of nerve fibers outside the CNS

Question 11

Which of the following equations correctly represents the relationship between the number of cranial and spinal nerves in the peripheral nervous system?

Accepted Answer

$$	ext{Total PNS nerves} = 12 + 31$$

Question 12

Which of the following is NOT a function of cerebrospinal fluid (CSF)?

Accepted Answer

Transmitting electrical impulses between neurons

Question 13

Which of the following best describes the role of interneurons?

Accepted Answer

Mediate impulses between sensory and motor neurons within the CNS

Question 14

A patient is experiencing increased heart rate, blood pressure, and sweating after a stressful event. Which hormone is most likely responsible for these symptoms?

Accepted Answer

Epinephrine (adrenaline)

Question 15

Which of the following is TRUE about the arrangement of spinal nerves?

Accepted Answer

Each spinal nerve is composed of both afferent and efferent fibers.

Question 16

Which equation best represents the number of spinal nerve pairs in each region?

Accepted Answer

$$8 + 12 + 5 + 5 + 1 = 31$$

Question 17

Which of the following is a function of the cerebellum?

Accepted Answer

Coordination of voluntary and involuntary complex patterns of movement

Question 18

Which of the following best describes the function of the dorsal rami of spinal nerves?

Accepted Answer

Carry motor and sensory fibers to the muscles and skin of the back

Question 19

Which of the following is TRUE regarding the parasympathetic division of the autonomic nervous system?

Accepted Answer

It stimulates salivary and digestive glands and promotes nutrient absorption.

Question 20

Which of the following best describes the function of the thalamus?

Accepted Answer

Relay center for all sensory impulses (except olfactory) to the cortex

Study Guide: Medical Terminology – Nervous System

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