Tryptophan serves as a precursor in the synthesis of
a. serotonin.
b. dopamine.
c. norepinephrine.
d. epinephrine.
Question 2
Adrenergic and noradrenergic receptor subtypes are
a. always ionotropic.
b. always metabotropic.
c. ionotropic in synapses using norepinephrine and metabotropic in synapses using epinephrine.
d. ionotropic in synapses using epinephrine and metabotropic in synapses using norepinephrine.