how does glucagon increase and insulin increases during exercise and why is this important?

Answer 1

both hormones work antagonistically...they DO NOT increase at the same time...glucagon secreted by alpha cells of the islets of langerhans in the pancreas increases conversion or amino acids and glycogen in the liver to glucose for aerobic and anaerobic respiration during exercise. this causes the glucose level to increase. when this level rises above normal it triggers secretion of insulin from beta cells of the islets of langerhans in the pancreas...while glucagon level falls...which lowers the glucose level again by increasing cell uptake of glucose, increasing oxidation of glucose to carbon dioxide and water during cellular respiration etc...when the blood glucose level is lowered insulin level falls.

Answer 2

Both glucagon and insulin are required during exercise because of the higher requirement for glucose at this time. Glucagon increases level of glucose in the blood by conversion of glycogen in the liver, insulin acts to increase the uptake into cells of this glucose, so it is more readily available to tissue. So both are needed at higher levels at this time.

Answer 3

You shouldn't be cheating your homework!!