Question 1

Which of the following is a 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

The Reticular Activating System (RAS) is crucial for which of the following functions?

Accepted Answer

Maintaining consciousness and filtering sensory input

Question 5

Which of the following best explains how stimulants affect neuronal activity?

Accepted Answer

They increase neurotransmitter release, enhancing synaptic transmission.

Question 6

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

Accepted Answer

Thalamus

Question 7

Alzheimer's disease primarily affects which part of the brain, leading to memory loss and cognitive decline?

Accepted Answer

Hippocampus

Question 8

If a person has damage to the pons and medulla, which vital function is most likely to be compromised?

Accepted Answer

Regulation of heart rate and breathing

Question 9

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

Accepted Answer

Sympathetic prepares the body for stress, parasympathetic promotes rest and recovery.

Question 10

Which equation best represents the relationship between the number of neurons ($N$) and the number of possible synaptic connections ($C$) in the brain?

Accepted Answer

$C = N^2$

Question 11

A patient is given a depressant drug. What is the most likely effect on their neuronal activity?

Accepted Answer

Decreased synaptic transmission and reduced neuronal firing

Question 12

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

Accepted Answer

Coordination of voluntary muscle movement

Question 13

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 facilitate rapid interhemispheric communication.

Question 14

Which equation describes the rate of neurotransmitter release ($R$) as a function of calcium ion concentration ($[Ca^{2+}]$) at the synaptic terminal?

Accepted Answer

$R = k 	imes [Ca^{2+}]$

Question 15

Which scenario best illustrates the body's use of the two ANS responses to regulate stress?

Accepted Answer

During a stressful event, the sympathetic system increases heart rate and respiration, while the parasympathetic system later restores these functions to baseline.

Question 16

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

Accepted Answer

Formation of amyloid plaques and neurofibrillary tangles in the cerebral cortex and hippocampus

Question 17

Which of the following best describes the role of the thalamus in sensory processing?

Accepted Answer

It acts as a relay center, directing sensory signals to appropriate areas of the cerebral cortex.

Question 18

A person is exposed to a stimulant and a depressant at the same time. What is the most likely outcome for their neuronal activity?

Accepted Answer

The effects may partially cancel each other, leading to a moderate change in neuronal firing.

Question 19

Which of the following is a function of the cerebellum?

Accepted Answer

Coordination of voluntary movements and balance

Question 20

Which equation best represents the relationship between the rate of action potential propagation ($v$) and the degree of myelination ($m$) in an axon?

Accepted Answer

$v = k 	imes m$

Central Nervous System: Structures and Functions (Chapter 11, Lecture 3)

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