BAPSY Biological Bases of Behavior 3

Question 1

What technique uses magnetic fields and radio waves to produce detailed images of brain structure without radiation?

Accepted Answer

MRI

Answer

Magnetic Resonance Imaging (MRI) uses magnetic fields and radio waves to generate high-resolution structural brain images.

Question 2

Heritability estimates from twin studies indicate the proportion of variance in a trait that is due to:

Accepted Answer

Genetic factors in a given population

Answer

Heritability is a population-level statistic estimating how much of trait variance within that population is attributable to genetic differences.

Question 3

Which neurotransmitter is the primary inhibitory transmitter in the adult brain?

Accepted Answer

GABA

Answer

Gamma-aminobutyric acid (GABA) hyperpolarizes neurons by opening Cl- channels, making it the main inhibitory neurotransmitter.

Question 4

The corpus callosum primarily connects which brain regions?

Accepted Answer

Left and right cerebral hemispheres

Answer

The corpus callosum is a massive white matter tract allowing communication between the left and right hemispheres.

Question 5

Which stress hormone, released by the adrenal cortex, is elevated during chronic stress?

Accepted Answer

Cortisol

Answer

Cortisol is a glucocorticoid released by the adrenal cortex in response to ACTH, and chronically elevated levels impair immune function and memory.

BAPSY - Bachelor of Arts in Psychology Practice Test