The Valve That Channels Blood to Flow in One Direction

question 34

Multiple Choice

The valve that channels blood to flow in one direction from the left atrium to the left ventricle is the:

• A) semilunar valve.
• B) mitral valve.
• C) aortic valve.
• D) tricuspid valve.

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Definitions:

Unconditioned Stimulus

In classical conditioning, a stimulus that instinctively and automatically induces a response without previously being learned.

Extinction

In psychology, the gradual disappearance of a conditioned response when the reinforcement is withheld; in biology, the end of an organism or of a group of organisms.

Stimulus Generalization

A psychological phenomenon where a response is elicited by stimuli similar, but not identical, to the original stimulus used in conditioning.

Classical Conditioning

A training method where two stimuli are consistently associated, leading to a response initially triggered by the second stimulus being ultimately triggered by the first stimulus alone.