Question 1

Which of the following best describes the concept of heritability as used in behavioral genetics?

Accepted Answer

The degree to which genetic differences contribute to individual differences in a trait within a population, expressed as a value between 0 and 1.

Question 2

Based on the graph showing variance explained by genetics and shared environment from ages 3 to 12, which statement is most accurate?

Accepted Answer

Genetic influence decreases with age, while shared environmental influence increases until about age 10, then stabilizes.

Question 3

Which neurotransmitter is most directly involved in voluntary muscle movement and attention, and is also associated with cognitive deficits in aging?

Accepted Answer

Acetylcholine

Question 4

A patient with damage to the cerebellum is most likely to experience which of the following symptoms?

Accepted Answer

Difficulty with balance, coordination, and emotional regulation

Question 5

Which brain structure acts as a relay station for sensory information, directing it to appropriate areas of the cortex?

Accepted Answer

Thalamus

Question 6

Which of the following best explains the action of an agonist drug at the synapse?

Accepted Answer

It enhances or mimics the effect of a neurotransmitter, increasing cellular activity.

Question 7

A person with right parietal lobe damage is most likely to exhibit which of the following symptoms?

Accepted Answer

Neglect of the left side of their visual field

Question 8

Which neurotransmitter is most closely associated with the regulation of mood, sleep, aggression, and appetite, and is targeted by many antidepressant medications?

Accepted Answer

Serotonin

Question 9

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

Accepted Answer

Facilitating planned movements and reward processing

Question 10

Which brain imaging technique is best suited for measuring rapid changes in brain activity during cognitive tasks, but has poor spatial resolution?

Accepted Answer

Electroencephalogram (EEG)

Question 11

A split-brain patient is shown an object in their left visual field. Which of the following is most likely to occur?

Accepted Answer

They cannot verbally name the object but can select it with their left hand.

Question 12

Which of the following best describes the all-or-none principle of action potentials?

Accepted Answer

A neuron either fires a full action potential or does not fire at all.

Question 13

Which structure is primarily responsible for forming new memories and is often damaged in cases of amnesia?

Accepted Answer

Hippocampus

Question 14

Which of the following is a likely effect of damage to the myelin sheath of neurons?

Accepted Answer

Decreased efficiency of neural transmission, as seen in multiple sclerosis

Question 15

Which lobe of the cerebral cortex is most involved in higher cognitive functions such as planning, decision-making, and voluntary movement?

Accepted Answer

Frontal lobe

Question 16

A drug that blocks the receptor sites for dopamine would be classified as which of the following?

Accepted Answer

Dopamine antagonist

Question 17

Which of the following best illustrates the concept of neuroplasticity?

Accepted Answer

The brain's capacity to reorganize and form new connections in response to experience or injury

Question 18

Which of the following is a function of the hypothalamus?

Accepted Answer

Temperature regulation and motivation (hunger, thirst, sex)

Question 19

Which neurotransmitter is most directly involved in the fight-or-flight response and increases attention and heart rate?

Accepted Answer

Norepinephrine

Question 20

Which of the following best describes the function of glial cells in the nervous system?

Accepted Answer

They mount immune responses, remove waste, and insulate axons with myelin.

Biology of the Mind: Foundations of Biological Psychology

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