Question 1

Which of the following best describes the main function of the central nervous system (CNS)?

Accepted Answer

To interpret sensory information, maintain homeostasis, and coordinate movement.

Question 2

Which structure is responsible for relaying sensory information to the cerebral cortex and acts as a gateway for most sensory input?

Accepted Answer

Thalamus

Question 3

A patient suffers damage to the frontal lobe, specifically the precentral gyrus. Which function is most likely to be impaired?

Accepted Answer

Initiating voluntary motor movements

Question 4

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

Accepted Answer

Coordination of voluntary muscle movement

Question 5

The white matter of the brain and spinal cord consists primarily of:

Accepted Answer

Myelinated axons

Question 6

Which equation correctly represents the conduction velocity $$v of an $$action potential along a myelinated axon, given the axon diameter $$d$$ and myelination factor $$m$$?

Accepted Answer

$$v = d 	imes m$$

Question 7

Which of the following best describes the role of the pons in the brainstem?

Accepted Answer

Relays signals between the cerebrum and cerebellum and assists in breathing regulation.

Question 8

A lesion in the occipital lobe would most likely result in which deficit?

Accepted Answer

Loss of visual processing

Question 9

Which of the following structures is NOT part of the diencephalon?

Accepted Answer

Cerebellum

Question 10

Which statement about the meninges is correct?

Accepted Answer

The arachnoid mater contains the subarachnoid space filled with cerebrospinal fluid.

Question 11

Which pathway best describes the transfer of information from sensory input to motor output in the CNS?

Accepted Answer

Sensory receptor → spinal cord → thalamus → primary sensory cortex → motor cortex → effector

Question 12

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

Accepted Answer

Regulation of voluntary motor movements and procedural learning

Question 13

Damage to the somatosensory association cortex (S2) would most likely result in:

Accepted Answer

Difficulty interpreting complex sensory information

Question 14

Which equation best represents the relationship between the number of synapses $$n$$ and the speed of signal transmission $$s in a $$neural pathway?

Accepted Answer

$$s = \frac{1}{n}$$

Question 15

Which lobe of the brain is primarily responsible for processing auditory information?

Accepted Answer

Temporal lobe

Question 16

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

Accepted Answer

Controls vital autonomic functions such as heart rate and breathing.

Question 17

Which structure is responsible for maintaining the blood-brain barrier and regulating the exchange of substances between the brain and blood?

Accepted Answer

Astrocytes

Question 18

Which of the following is a correct description of the function of the primary visual cortex?

Accepted Answer

Processes visual information received from the retina.

Question 19

Which equation best represents the calculation of cerebral blood flow $$CBF$$ given cerebral perfusion pressure $$CPP$$ and cerebrovascular resistance $$CVR$$?

Accepted Answer

$$CBF = \frac{CPP}{CVR}$$

Question 20

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

Accepted Answer

Processing emotions and memory formation

Central Nervous System: Structure, Function, and Protection

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