Examlex
Which of the following cells is a component of the body's first line defense?
Unconditioned Stimulus
In classical conditioning, a stimulus that naturally and automatically triggers a response without any prior learning.
Extinction
The weakening and eventual disappearance of a learned response; in classical conditioning, it occurs when the conditioned stimulus is no longer paired with the unconditioned stimulus; in operant conditioning, it occurs when a response is no longer followed by a reinforcer.
Conditioned Response
A learned reaction to a previously neutral stimulus that has become associated with an unconditioned stimulus.
Spontaneous Recovery
The reappearance of a learned response after its apparent extinction.
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