Question 1

Which of the following best describes the process of cephalization in the evolution of the central nervous system?

Accepted Answer

The evolutionary increase in the number of neurons in the anterior portion of the CNS, culminating in the human brain.

Question 2

During embryonic development, which adult brain structure arises from the metencephalon?

Accepted Answer

Cerebellum and pons

Question 3

Which of the following is a function of the thalamus?

Accepted Answer

Relay station for sensory information to the cerebral cortex

Question 4

A patient suffers a stroke that damages the left primary motor cortex. Which of the following is most likely to occur?

Accepted Answer

Paralysis of muscles on the right side of the body

Question 5

Which of the following best explains why the cerebral cortex is highly folded?

Accepted Answer

To increase the surface area for higher cognitive functions

Question 6

Which lobe of the cerebral hemisphere is primarily responsible for processing visual information?

Accepted Answer

Occipital lobe

Question 7

Damage to which area of the brain would most likely result in the inability to comprehend spoken and written language, while speech production remains fluent but nonsensical?

Accepted Answer

Wernicke's area

Question 8

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

Accepted Answer

It is formed by tight junctions between endothelial cells and is absent in some brain regions.

Question 9

A patient presents with tremors at rest, shuffling gait, and difficulty initiating movement. Which brain region is most likely affected?

Accepted Answer

Substantia nigra of the midbrain

Question 10

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

Accepted Answer

Maintains cerebral cortical alertness and filters out repetitive stimuli

Question 11

Which of the following is a direct (pyramidal) descending motor pathway?

Accepted Answer

Lateral corticospinal tract

Question 12

A patient with a lesion in the right posterior association area of the cerebral cortex may exhibit which of the following symptoms?

Accepted Answer

Neglect of the left side of their body

Question 13

Which of the following is a function of the hypothalamus?

Accepted Answer

Regulation of body temperature, hunger, and water balance

Question 14

Which of the following best describes the role of the cerebellum?

Accepted Answer

Processes input from the cortex and sensory receptors to coordinate movement and balance

Question 15

Which of the following is TRUE regarding the organization of gray and white matter in the CNS?

Accepted Answer

In the cerebrum, gray matter forms a superficial cortex and is also found in nuclei within white matter.

Question 16

Which of the following is a function of the limbic system?

Accepted Answer

Mediation of emotional responses and involvement in memory processing

Question 17

Which of the following best describes the function of the dorsal column–medial lemniscal pathway?

Accepted Answer

Transmits discriminative touch and proprioceptive information to the cortex

Question 18

Which of the following is a likely consequence of damage to the primary visual cortex?

Accepted Answer

Functional blindness

Question 19

Which of the following best explains why hydrocephalus is more dangerous in adults than in newborns?

Accepted Answer

The adult skull is rigid, so increased pressure can compress brain tissue.

Question 20

Which of the following is a characteristic of the reticulospinal tract?

Accepted Answer

It is an indirect pathway that helps regulate muscle tone and visceral motor functions.

Central Nervous System: Structure, Development, and Functional Organization

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