1.

In the adrenal medulla:

A. epinephrine is formed by the hydroxylation and decarboxylation of tyrosine
B. 10% of the cells are the epinephrine-secreting type
C. plasma norepinephrine levels are generally unchanged after adrenalectomy
D. catecholamine t1/2 is 10 minutes in the circulation
Answer» D. catecholamine t1/2 is 10 minutes in the circulation


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