Question 1

Which of the following best describes the primary function of the diencephalon?

Accepted Answer

It processes, integrates, and relays information to different parts of the brain, and regulates homeostatic functions.

Question 2

A patient suffers a stroke that damages the left occipital lobe. Which of the following symptoms is most likely to result?

Accepted Answer

Impaired processing of visual information.

Question 3

Which structure is responsible for producing cerebrospinal fluid (CSF)?

Accepted Answer

Ependymal cells and the choroid plexus

Question 4

A patient presents with loss of somatic motor function in the lower limbs. Which region of the spinal cord gray matter is most likely damaged?

Accepted Answer

Anterior horn

Question 5

Which of the following best explains why the brain requires about 20% of the body's total blood flow at rest?

Accepted Answer

The brain requires large amounts of oxygen, glucose, and nutrients to support its high metabolic activity.

Question 6

Which of the following is a function exclusive to the central nervous system (CNS)?

Accepted Answer

Decision-making and higher mental functions such as language and learning

Question 7

A patient is unable to coordinate complex movements such as playing the piano, but basic muscle strength is intact. Which brain region is most likely affected?

Accepted Answer

Cerebellum

Question 8

Which of the following best describes the function of the blood-brain barrier?

Accepted Answer

It separates cerebrospinal fluid and brain extracellular fluid from chemicals and pathogens in the blood.

Question 9

Which of the following correctly matches a lobe of the cerebrum with its primary function?

Accepted Answer

Parietal lobe – integrating sensory information and somatosensation

Question 10

A patient has a tumor compressing the cerebral aqueduct. Which of the following is the most likely consequence?

Accepted Answer

Obstruction of cerebrospinal fluid flow between the third and fourth ventricles

Question 11

Which of the following best describes the arrangement of gray and white matter in the spinal cord?

Accepted Answer

White matter surrounds a central butterfly-shaped region of gray matter.

Question 12

Which meningeal layer is in direct contact with the brain tissue?

Accepted Answer

Pia mater

Question 13

A patient presents with loss of pain and temperature sensation on the right side of the body below the neck, but touch and proprioception are intact. Which spinal cord tract is most likely damaged?

Accepted Answer

Left spinothalamic tract

Question 14

Which of the following is a function of the reticular formation?

Accepted Answer

Coordination of movement and maintenance of alertness

Question 15

Which of the following best explains the significance of the decussation of corticospinal fibers in the medulla oblongata?

Accepted Answer

It results in each side of the brain controlling voluntary movements on the opposite side of the body.

Question 16

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

Accepted Answer

Providing a medium for electrical impulses to travel between neurons

Question 17

A patient with a lesion in the hypothalamus may experience which of the following symptoms?

Accepted Answer

Disruption of sleep/wake cycles and body temperature regulation

Question 18

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

Accepted Answer

It is responsible for higher mental functions such as learning, memory, personality, and language.

Question 19

Which of the following structures is responsible for relaying most sensory information (except smell) to the cerebral cortex?

Accepted Answer

Thalamus

Question 20

A patient is diagnosed with hydrocephalus, a condition in which cerebrospinal fluid accumulates in the brain. Which of the following is the most likely cause?

Accepted Answer

Overproduction of CSF by the choroid plexus and/or obstruction of CSF flow through the ventricles

The Central Nervous System: Structure and Function

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