The Result of Activity in the Hypothalamic-Pituitary-Adrenal (HPA) Axis Is

question 160

Multiple Choice

 The result of activity in the hypothalamic-pituitary-adrenal (HPA) axis is

• A) activation of the amygdala.
• B) reductions in serotonergic activity.
• C) increases in the release of testosterone.
• D) increases in the release of cortisol.

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Definitions:

Gametic Incompatibility

Occurs when sperm or pollen from one species fails to penetrate and fertilize the egg or ovule of another species.

Reproductive Isolation

A collection of mechanisms, behaviors, and physiological processes that prevent the members of two different species from producing offspring, or ensure any offspring are sterile.

Hummingbirds

A family of small, brightly colored birds known for their rapid wingbeat, ability to hover, and preference for feeding on nectar.

Phylogenetic Species Concept

A method for classifying organisms based on the smallest group of individuals that share a common ancestor, emphasizing the evolutionary history of populations.