During exercise, the levels of epinephrine and glucagon rise and the level of insulin falls, leading to activation of
A) glycogen synthase.
B) lipoprotein lipase.
C) phosphorylase.
D) acetyl CoA carboxylase.
E) citrate lyase.

Question

Quizplus · Accepted Answer

During exercise, the levels of epinephrine and glucagon rise, and the level of insulin falls, leading to activation of phosphorylase. Phosphorylase is an enzyme that facilitates the breakdown of glycogen to glucose-1-phosphate, which can be used as an energy source during exercise.

Answer: B 
 Lipoprotein lipase is not directly activated during exercise. Its levels may be affected by exercise in the long-term, through changes in muscle mass and metabolic rate.

Other choices are not relevant to the hormonal changes during exercise.

During Exercise, the Levels of Epinephrine and Glucagon Rise and the Level