Discussion
A hormone secreted by the alpha cells of the pancreas that causes increased blood glucose levels is ..........
Answer: A
The hormone is Glucagon.
The alpha cells of the islets of Langerhans secrete glucagon when blood glucose falls, for example during fasting or prolonged exercise. Glucagon makes the liver break down glycogen and make new glucose, raising blood glucose. Insulin, from the beta cells, has the opposite effect.
The other options are not hormones. Glycolysis is the breakdown of glucose for energy, glycogenolysis the breakdown of glycogen to glucose (a process glucagon stimulates), and osmosis the movement of water across a membrane.
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