The following graph shows fluctuations in an individual’s blood levels of a hormone over a 24-hour period. Identify the hormone.

After you eat food and the food is digested and absorbed, your blood glucose level rises. 

Beta cells in pancreas release insulin into your bloodstream. 

Insulin signals cells to absorb sugar from the bloodstream. 

The insulin levels rapidly climb and peak in about 45 minutes to one hour, before falling back to the basal levels.