Alpha2-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
Q63: Alpha-1-adrenergic receptors are mediated by
A)cAMP.
B)Ca2+.
C)K+.
D)Na+.
Q64: All adrenergic receptors act via
A)ligand-gated channels.
B)sodium-potassium pump.
C)H-proteins.
D)G-proteins.
Q65: The _ has both a1 and b1
Q66: Postganglionic _ nerves release acetylcholine.
A)sympathetic
B)parasympathetic
C)somatic
D)sensory
Q67: The swellings on postganglionic axons that contain
Q69: The second messenger mediating the effects of
Q70: Blocking 2-adrenergic receptors prevents airway
A)constriction.
B)dilation.
Q71: Fibers that secrete acetylcholine are called cholinergic
Q72: Fibers that secrete norepinephrine are called adrenergic
Q73: The neurotransmitter released at terminal ganglia is
A)acetylcholine.
B)dopamine.
C)epinephrine.
D)norepinephrine.
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