What will be happening in a person after eight hours of sleep?
a. β cells in the pancreas will be producing insulin.
b. glucose will be converted into glucagon.
c. α cells in the pancreas will be producing glucagon.
d. glycogen is being produced and stored in the liver and muscle cells.

The answer is (c.) a (alpha cells) in the pancreas will be producing glucagon.

When a person sleeps for more than eight hours, the alpha cells in the pancreas will start to produce glucagon. The glucagon is responsible for the increase in blood glucose level the opposite of insulin which decreases the level.