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.
Correct Answer:
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Q21: Autonomic ganglion neurons switch from phasic-firing to
Q22: The application of ACh to muscarinic receptors
Q23: In a neuron's resting state, M-channels are
Q24: The purine transmitters include
A) acetylcholine and adenosine.
B)
Q25: ATP is a major neurotransmitter in the
A)
Q27: Beta-blockers, which block the actions of norepinephrine
Q28: Regulation of blood pressure based on body
Q29: Excessive feeding _; while starvation _.
A) activates
Q30: The enteric nervous system
A) is a useful
Q31: The enteric nervous system is still not
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