Question 1

Which of the following best describes the primary function of the thalamus in the brain?

Accepted Answer

It serves as a relay station for most sensory input before it is sent to the cerebral cortex.

Question 2

A patient presents with loss of balance and poor coordination after a stroke. Which brain region is most likely affected?

Accepted Answer

Cerebellum

Question 3

Which glial cell type is responsible for forming the myelin sheath in the central nervous system (CNS)?

Accepted Answer

Oligodendrocytes

Question 4

Which of the following is NOT a function of astrocytes in the CNS?

Accepted Answer

Forming myelin sheaths around axons

Question 5

A patient with multiple sclerosis (MS) is experiencing muscle weakness and visual disturbances. What is the underlying cause of these symptoms?

Accepted Answer

Destruction of the myelin sheath in the CNS by the immune system

Question 6

Which of the following structures is responsible for producing cerebrospinal fluid (CSF)?

Accepted Answer

Choroid plexus

Question 7

Which lobe of the cerebral cortex contains the primary visual cortex?

Accepted Answer

Occipital lobe

Question 8

Which of the following best describes the function of the reticular activating system (RAS)?

Accepted Answer

It filters out repetitive or weak stimuli and keeps the cerebral cortex alert.

Question 9

Which of the following is a correct pairing of a brain region and its primary function?

Accepted Answer

Cerebral cortex – voluntary motor initiation and sensory perception

Question 10

Which of the following best explains why damage to the medulla oblongata can be fatal?

Accepted Answer

It controls automatic behaviors necessary for survival, such as heart rate and breathing.

Question 11

Which of the following is TRUE regarding the meninges?

Accepted Answer

The dura mater consists of two layers in the brain and forms dural septa.

Question 12

Which of the following best describes the flow of cerebrospinal fluid (CSF) in the brain?

Accepted Answer

CSF circulates from the choroid plexus through the ventricles, into the subarachnoid space, and is reabsorbed by arachnoid granulations.

Question 13

A patient is unable to understand spoken or written language but can speak fluently, although their words make little sense. Which brain area is most likely damaged?

Accepted Answer

Wernicke's area

Question 14

Which of the following is a function of the hypothalamus?

Accepted Answer

Regulation of body temperature and hunger

Question 15

Which of the following best describes the role of the limbic system?

Accepted Answer

It mediates emotional responses and memory formation.

Question 16

Which of the following is TRUE about the organization of the nervous system?

Accepted Answer

The central nervous system is responsible for integration and control.

Question 17

Which of the following is a correct description of the function of microglial cells?

Accepted Answer

They phagocytize microorganisms and neuronal debris.

Question 18

Which of the following best explains why myelinated axons conduct impulses faster than unmyelinated axons?

Accepted Answer

Myelin electrically insulates the axon, allowing saltatory conduction between nodes.

Question 19

Which of the following is a function of the ependymal cells in the CNS?

Accepted Answer

They circulate cerebrospinal fluid with their cilia.

Question 20

A patient has a tumor compressing the precentral gyrus of the cerebral cortex. Which of the following symptoms would most likely result?

Accepted Answer

Loss of voluntary motor control on the contralateral side of the body

The Nervous System: Structure, Function, and Protection

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