When you first wake up in the morning, before you have eaten breakfast, which of the following hormones would you expect to be in the highest concentration in your blood relative to when you were last awake?

Question

Quizplus · Accepted Answer

After a long period of fasting (such as overnight), the body's blood sugar levels are likely to be low. In response, the hormone glucagon is released by the pancreas to stimulate the breakdown of stored glycogen (a form of glucose) in the liver in order to raise blood sugar levels. Therefore, before breakfast, glucagon would be expected to be present in the highest concentration in the blood.

When You First Wake Up in the Morning, Before You