P1 and P2 Receptors Are So Named Because They Are

question 39

Multiple Choice

P1 and P2 receptors are so named because they are

• A) prevalent in the parasympathetic nervous system.
• B) activated by purines.
• C) activated by polypeptides.
• D) responsive to pain.
• E) located in the pituitary.

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Definitions:

Unconditioned Response

A natural, unlearned reaction to an unconditioned stimulus, such as salivation when food is presented, inherent in classical conditioning.

Unconditioned Stimulus

A stimulus that naturally and automatically triggers a response without needing prior learning.

Spontaneous Recovery

The return of a conditioned response that had vanished, following a pause where the conditioned stimulus was not presented.

Classical Conditioning

The conditioning process of repeatedly associating two stimuli together, such that a reaction first brought about by the second stimulus is later brought about by the first stimulus alone.