Question:

Which of the following is the action of insulin?

Decreases blood sugar level by forming glycogen

Blood glucose level increases by hydrolysing glycogen in liver

Increases blood glucose level by promoting cellular uptake of glucose

Increases blood glucose level by stimulating glucagon production

Solution:

The correct option is A. Decreases blood sugar level by forming glycogen. Insulin serves to lower the blood glucose level by stimulating the uptake of glucose by cells, specifically muscle cells, liver cells, and adipose tissue cells. Liver and muscle cells store glucose as glycogen. Glucagon hormone serves to increase the blood glucose level. So, the correct option is A.