Alpha-adrenergic receptors on presynaptic axon terminals, when stimulated, cause
A) increased release of norepinephrine.
B) decreased release of epinephrine.
C) increased release of epinephrine.
D) decreased release of norepinephrine.
Correct Answer:
Verified
Q62: Atropine would
A)block the release of epinephrine from
Q62: Epinephrine is a
A)sympathetic neurotransmitter.
B)parasympathetic neurotransmitter.
C)sympathomimetic hormone.
D)All of
Q63: The _ has both a1 and b1
Q63: Alpha-1-adrenergic receptors are mediated by
A)cAMP.
B)Ca2+.
C)K+.
D)Na+.
Q65: Blocking b2-adrenergic receptors prevents airway
A)constriction.
B)dilation.
Q69: The second messenger mediating the effects of
Q74: _ selectively stimulates a2 receptors in brain
Q77: Phenylephrine functions as a _ because it
Q86: Nicotinic agonists would bind cholinergic receptors on
Q90: M2 receptors in the heart
A)decrease heart rate.
B)increase
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