homeostasis

Answer explanation

process by which organisms maintain a relatively stable internal environment

stimulus

Answer explanation

An environmental change that directly influences the activity of a living organism.

internal stimulus

Answer explanation

A change from within an organism, such as hunger and thirst, that causes the organism to respond

external stimulus

Answer explanation

a stimulus that comes from outside the organism such as light, sound, and temperature

response

Answer explanation

an organism's reaction to a stimulus

learned behavior

Answer explanation

a behavior that has been learned from experience or observation

instinct

Answer explanation

a natural behavior or sense that doesn't have to be learned. Automatic response

fight or flight response

Answer explanation

sequence of internal processes preparing an organism for struggle or escape

behavior

Answer explanation

actions of an organism in response to its environment.

conditioned stimulus

Answer explanation

the reflexive behavior (learned response) due to a repetitive stimulus. i.e. Pavlov's theory