8.
Epinephrine and glucagon have which of the following effects on hepatic glycogen metabolism?
A:
Both glycogen phosphorylase and glycogen synthase are activated by phosphorylation but at significantly different rates
B:
Glycogen phosphorylase is inactivated by the resulting rise in calcium, whereas glycogen synthase is activated
C:
Glycogen phosphorylase is phosphorylated and active, whereas glycogen synthase is phosphorylated and inactive
D:
The net synthesis of glycogen is increased
The answer is:
C
