Question 1

Which of the following best describes the function of cerebrospinal fluid (CSF) in the central nervous system?

Accepted Answer

CSF contributes to buoyancy, protection, and chemical stability for the brain and spinal cord.

Question 2

A patient suffers a traumatic brain injury resulting in a subdural hematoma. Which meningeal layer is most directly involved in this condition?

Accepted Answer

Dura mater

Question 3

Which structure separates the right and left cerebral hemispheres?

Accepted Answer

Longitudinal fissure

Question 4

If the blood supply to the brain is interrupted for 10 seconds, what is the most likely immediate effect?

Accepted Answer

Loss of consciousness

Question 5

Which of the following equations correctly represents the rate of cerebrospinal fluid (CSF) production in the adult human?

Accepted Answer

$$\frac{20\ \mathrm{ml}}{1\ \mathrm{hour}}$$

Question 6

Which of the following best explains why the brain requires a continuous supply of glucose and oxygen?

Accepted Answer

Neurons depend on aerobic glycolysis and cannot store glucose.

Question 7

A stroke caused by occlusion of a cerebral blood vessel is classified as which type of event?

Accepted Answer

Ischemic stroke

Question 8

Which of the following structures is responsible for connecting the two cerebral hemispheres and allowing communication between them?

Accepted Answer

Corpus callosum

Question 9

Which meningeal layer is a delicate membrane that closely follows all contours of the brain and spinal cord?

Accepted Answer

Pia mater

Question 10

Which of the following is a function of the blood-brain barrier (BBB)?

Accepted Answer

It prevents passage of harmful substances and pathogens from the blood to the brain.

Question 11

Which of the following best describes the location and function of the choroid plexus?

Accepted Answer

Located in the ventricles; produces cerebrospinal fluid (CSF).

Question 12

Which equation best represents the percentage of oxygen consumed by the brain compared to total body oxygen consumption?

Accepted Answer

$$\frac{20\%}{100\%}$$

Question 13

Damage to the primary motor cortex would most likely result in which of the following?

Accepted Answer

Impaired voluntary movement

Question 14

Which of the following statements about gray and white matter in the brain is correct?

Accepted Answer

Gray matter forms the superficial layer called the cortex, while white matter lies deep to it.

Question 15

Which of the following best describes the role of the superior sagittal sinus?

Accepted Answer

It drains blood and absorbed CSF from the brain.

Question 16

A patient presents with symptoms of confusion, dizziness, and convulsions after fasting for several days. Which metabolic process is most likely impaired?

Accepted Answer

Glucose supply to the brain

Question 17

Which of the following is NOT a function of the cerebrum?

Accepted Answer

Regulation of heart rate and breathing

Question 18

Which of the following best explains the importance of the blood-brain barrier (BBB) in pharmacology?

Accepted Answer

It restricts the entry of many drugs, requiring special formulations for CNS treatment.

Question 19

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

Accepted Answer

White matter forms the outer layer, while gray matter is central.

Question 20

Which of the following is a consequence of a 4-minute interruption in blood flow to the brain?

Accepted Answer

Irreversible brain damage

Central Nervous System: Structure, Protection, and Function

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