Question 1

Which of the following best describes the primary function of the corpus callosum in the human brain?

Accepted Answer

It connects the left and right cerebral hemispheres, allowing communication between them.

Question 2

A patient suffers trauma to the cerebellum. Which symptom would most likely be observed?

Accepted Answer

Impaired coordination and balance.

Question 3

Which neurotransmitter is primarily associated with the sympathetic nervous system's 'fight or flight' response?

Accepted Answer

Norepinephrine

Question 4

Which structure acts as a relay station for sensory information traveling to the cerebral cortex?

Accepted Answer

Thalamus

Question 5

Stimulants and depressants affect neurons differently. Which statement is correct regarding their effects?

Accepted Answer

Stimulants increase neuronal firing and neurotransmitter release; depressants decrease neuronal activity.

Question 6

Which of the following best explains how the Reticular Activating System (RAS) helps prevent 'information overload' in the brain?

Accepted Answer

By filtering out unnecessary sensory information before it reaches the cortex.

Question 7

Which of the following is a direct effect of Alzheimer's disease on the brain?

Accepted Answer

Degeneration of neurons and synapses, resulting in memory loss and cognitive decline.

Question 8

Which of the following best describes the difference between the sympathetic and parasympathetic nervous systems?

Accepted Answer

The sympathetic system increases heart rate and energy expenditure; the parasympathetic system promotes relaxation and energy conservation.

Question 9

Which equation best represents the relationship between the number of neurons ($$N$$), the number of synapses per neuron ($$S$$), and the total number of synapses ($$T) in $$the brain?

Accepted Answer

$$T = N 	imes S$$

Question 10

A person is exposed to a stressful situation. Which sequence best describes the body's autonomic nervous system response?

Accepted Answer

Sympathetic activation increases heart rate and respiration; parasympathetic activation restores baseline after stress.

Question 11

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

Accepted Answer

Coordination of voluntary muscle movement.

Question 12

Which of the following best explains why the corpus callosum contains more white matter than gray matter?

Accepted Answer

It is composed mainly of myelinated axons that transmit signals between hemispheres.

Question 13

Which scenario best illustrates the role of the thalamus in sensory processing?

Accepted Answer

Visual information from the eyes is relayed to the occipital lobe via the thalamus.

Question 14

Which of the following is a likely effect of depressants on neuronal activity?

Accepted Answer

Decreased synaptic transmission and reduced neuronal firing.

Question 15

Which equation correctly represents the calculation of average neuronal firing rate ($$F) $$given total action potentials ($$A) $$over time ($$t$$)?

Accepted Answer

$$F = A / t$$

Question 16

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

Accepted Answer

They control vital autonomic functions such as breathing and heart rate.

Question 17

Which neurotransmitter is most associated with the parasympathetic nervous system?

Accepted Answer

Acetylcholine

Question 18

A patient with Alzheimer's disease is unable to remember recent events but can recall childhood memories. Which brain region is most likely affected?

Accepted Answer

Hippocampus

Question 19

Which of the following best explains how the body uses the two autonomic nervous system (ANS) responses to regulate stress?

Accepted Answer

The sympathetic system increases stress hormones, while the parasympathetic system counteracts by promoting relaxation.

Question 20

Which of the following is a function of the cerebellum?

Accepted Answer

Coordination of voluntary movements and balance.

Central Nervous System: Structure, Function, and Disorders

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