Question 1

Which brain region is primarily responsible for high-level functions such as thought, memory, emotion, speech, and voluntary movement?

Accepted Answer

Cerebrum

Question 2

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

Accepted Answer

Regulating heart rate

Question 3

The thalamus acts as a relay station for which types of signals?

Accepted Answer

Both sensory and motor signals

Question 4

Which structure connects the nervous and endocrine systems and serves as the main visceral control center?

Accepted Answer

Hypothalamus

Question 5

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

Accepted Answer

It isolates the CNS from general circulation, allowing only selective substances to pass

Question 6

Which glial cell type is primarily responsible for maintaining the blood-brain barrier?

Accepted Answer

Astrocytes

Question 7

What is the main function of the dural folds in the cranial cavity?

Accepted Answer

To compartmentalize and stabilize the brain, limiting excessive movement

Question 8

Which of the following is the correct sequence for the flow of cerebrospinal fluid (CSF) through the ventricular system?

Accepted Answer

Lateral ventricles → third ventricle → fourth ventricle → subarachnoid space

Question 9

A patient with decreased diffusion across the arachnoid granulations would most likely experience which of the following?

Accepted Answer

Increased volume of cerebrospinal fluid in the ventricles

Question 10

Which of the following arteries supplies blood to the brain?

Accepted Answer

Vertebral artery

Question 11

Which layer of the meninges is directly attached to the surface of the brain and supports blood vessels?

Accepted Answer

Pia mater

Question 12

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

Accepted Answer

Choroid plexus

Question 13

Which of the following best describes the selective permeability of the blood-brain barrier?

Accepted Answer

It allows only lipid-soluble compounds and gases like $$O_2$$ and $$CO_2 to $$diffuse

Question 14

Which of the following is a function of cerebrospinal fluid (CSF)?

Accepted Answer

Cushioning neural tissue against sudden movements

Question 15

Which of the following is a consequence of a cerebrovascular accident (CVA) or stroke?

Accepted Answer

Rapid death of affected neurons due to loss of blood flow

Question 16

Which of the following best describes the role of arachnoid villi/granulations?

Accepted Answer

Acting as one-way valves for CSF absorption into the venous system

Question 17

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

Accepted Answer

Producing neurotransmitters

Question 18

Which of the following best describes the function of the dural sinuses?

Accepted Answer

Draining deoxygenated blood and CSF from the brain into the internal jugular veins

Question 19

Which of the following is a direct result of damage to the blood-brain barrier?

Accepted Answer

Increased risk of harmful substances entering the brain tissue

Question 20

Which of the following is the correct formula for the effective weight reduction of the brain due to cerebrospinal fluid?

Accepted Answer

$$W_{effective} = W_{actual} 	imes 0.05$$

The Brain and Cranial Nerves: Structure, Protection, and Cerebrospinal Fluid

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