Examlex
Draw the structure of cytosine and thymine, then show the most common tautomer of each.
Unconditioned Response
A reflexive, unlearned reaction to a stimulus that takes place naturally, without any previous conditioning or learning.
Unconditioned Stimulus
A stimulus that automatically triggers a natural and unlearned response.
Neutral Stimulus
An initially meaningless stimulus that, when consistently paired with an unconditioned stimulus, can acquire the capacity to elicit a conditioned response.
Conditioned Response
A learned response to a previously neutral stimulus that has been repeatedly presented alongside an unconditioned stimulus.
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