Increased levels of epinephrine in the blood will
(I)activate adenylate cyclase in liver and muscle cells.
(II)stimulate glycogen synthesis.
(III)inhibit glycolysis in the muscle cell.
(IV)stimulate gluconeogenesis in the muscle cell.

Question

Quizplus · Accepted Answer

Epinephrine, a hormone released during stress or excitement, activates adenylate cyclase in liver and muscle cells, leading to increased levels of cyclic AMP. This activation promotes glycogen breakdown and inhibits glycogen synthesis, contrary to option II. It also stimulates glycolysis in muscle cells, making option III incorrect. Muscle cells cannot perform gluconeogenesis, which makes option IV incorrect. Therefore, only option I is correct.

Increased Levels of Epinephrine in the Blood Will