Question 1

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

Accepted Answer

Corpus callosum

Question 2

A patient presents with tremors at rest, a shuffling gait, and a blank facial expression. Which brain structure is most likely affected, and what neurotransmitter is deficient?

Accepted Answer

Basal nuclei; dopamine

Question 3

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

Accepted Answer

It acts as a relay station, sorting and editing sensory input before sending it to the cerebral cortex.

Question 4

Damage to which area of the cerebral cortex would most likely result in loss of the ability to form words (motor speech)?

Accepted Answer

Broca's area

Question 5

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

Accepted Answer

Control of voluntary skeletal muscle movement

Question 6

A patient suffers a stroke that blocks blood flow to the left cerebral hemisphere. Which of the following symptoms is most likely to occur?

Accepted Answer

Paralysis on the right side of the body

Question 7

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

Accepted Answer

Gray matter surrounds the central cavity, with white matter external to it.

Question 8

Which brain region is primarily responsible for coordinating voluntary movements, balance, and agility?

Accepted Answer

Cerebellum

Question 9

A patient with a traumatic brain injury develops cerebral edema. What is the primary concern with this condition?

Accepted Answer

Increased intracranial pressure leading to brain damage

Question 10

Which of the following statements about the blood-brain barrier is TRUE?

Accepted Answer

It is formed by tight junctions between capillary endothelial cells.

Question 11

Which of the following best explains why injury to the reticular formation can result in a coma?

Accepted Answer

It governs arousal and alertness of the cerebral cortex.

Question 12

Which of the following is a function of the basal nuclei?

Accepted Answer

Filtering out incorrect or inappropriate responses

Question 13

A patient is unable to perceive taste and has lost the sensation of a full bladder. Which cortical areas are most likely damaged?

Accepted Answer

Gustatory and visceral sensory cortex

Question 14

Which of the following best describes the flow of cerebrospinal fluid (CSF) through the brain's ventricular system?

Accepted Answer

Lateral ventricles → third ventricle → cerebral aqueduct → fourth ventricle → central canal

Question 15

Which of the following is a characteristic of REM sleep?

Accepted Answer

Temporary paralysis of most skeletal muscles except ocular and diaphragm muscles

Question 16

Which of the following is TRUE regarding the organization of the spinal cord?

Accepted Answer

Dorsal roots carry sensory input into the spinal cord.

Question 17

A patient with a spinal cord transection between C1 and C7 would most likely experience:

Accepted Answer

Quadriplegia

Question 18

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

Accepted Answer

It contains autonomic reflex centers that regulate heart rate, blood pressure, and respiration.

Question 19

Which of the following is a direct result of the contralateral organization of the cerebral cortex?

Accepted Answer

Each hemisphere controls the opposite side of the body.

Question 20

Which of the following is a common cause of hemiplegia following a cerebrovascular accident (CVA)?

Accepted Answer

Blockage of a cerebral artery by a clot

The Central Nervous System: Structure, Function, and Organization

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