Question 1

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

Accepted Answer

Neurons either fire completely or not at all, regardless of stimulus strength once threshold is reached.

Question 2

Which neurotransmitter is most commonly associated with inhibitory effects in the central nervous system?

Accepted Answer

GABA

Question 3

A patient is experiencing difficulty with voluntary movement and reward processing. Which brain structure is most likely affected?

Accepted Answer

Basal ganglia

Question 4

Which brain imaging technique is best for determining 'when' a specific brain activity occurs, rather than 'where'?

Accepted Answer

Electroencephalography (EEG)

Question 5

Which division of the nervous system is responsible for mobilizing the 'fight-or-flight' response?

Accepted Answer

Sympathetic nervous system

Question 6

A researcher wants to infer causation by directly manipulating brain areas to treat depression. Which technique should they use?

Accepted Answer

Transcranial magnetic stimulation (TMS)

Question 7

Which of the following best illustrates the concept of heritability in behavioral genetics?

Accepted Answer

The percentage of variability in a trait across individuals that is due to genes.

Question 8

Which neurotransmitter is primarily involved in arousal, selective attention, sleep, and memory?

Accepted Answer

Acetylcholine (ACh)

Question 9

A person suffers damage to the prefrontal cortex and begins to display impulsive and socially inappropriate behavior. This scenario is most similar to which famous case?

Accepted Answer

Phineas Gage

Question 10

Which part of the neuron receives messages from other neurons?

Accepted Answer

Dendrites

Question 11

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

Accepted Answer

Relays information from the sense organs to the primary sensory cortex

Question 12

Which hormone is released by the adrenal glands during states of emotional arousal and is responsible for mobilizing the body for action?

Accepted Answer

Adrenaline (epinephrine)

Question 13

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

Accepted Answer

Processing visual information

Question 14

Which of the following best explains the concept of neural plasticity?

Accepted Answer

The nervous system's ability to change over time, including growth, synapse formation, and retraction.

Question 15

A drug that blocks serotonin reuptake acts as which type of agent?

Accepted Answer

Agonist

Question 16

Which of the following best describes the 'lock-and-key' model of neurotransmitter action?

Accepted Answer

Neurotransmitters bind only to specific receptor sites that match their shape.

Question 17

Which brain region is most associated with processing emotions such as fear and anger?

Accepted Answer

Amygdala

Question 18

Which of the following is a correct formula for calculating heritability ($$h^2) $$given genetic variance ($$V_g) $$and total phenotypic variance ($$V_p$$)?

Accepted Answer

$$h^2$$ = \frac{V_g}{V_p}$$

Question 19

Which scenario best illustrates the concept of a positive correlation?

Accepted Answer

As percent of classes attended increases, psychology exam scores increase.

Question 20

Which structure connects the left and right hemispheres of the brain, allowing communication between them?

Accepted Answer

Corpus callosum

Biological Psychology: The Brain, Neurons, and Behavior

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