Table of contents

1. Introduction to Biochemistry4h 34m
2. Water3h 23m
3. Amino Acids8h 10m
4. Protein Structure10h 4m
5. Protein Techniques14h 5m
6. Enzymes and Enzyme Kinetics13h 38m
7. Enzyme Inhibition and Regulation 8h 42m
8. Protein Function 9h 41m
9. Carbohydrates7h 49m
10. Lipids5h 49m
11. Biological Membranes and Transport 6h 37m
12. Biosignaling9h 45m
Review 1: Nucleic Acids, Lipids, & Membranes2h 47m
Review 2: Biosignaling, Glycolysis, Gluconeogenesis, & PP-Pathway3h 12m
Review 3: Pyruvate & Fatty Acid Oxidation, Citric Acid Cycle, & Glycogen Metabolism2h 26m
Review 4: Amino Acid Oxidation, Oxidative Phosphorylation, & Photophosphorylation1h 48m

12. Biosignaling

Insulin

Biochemistry

12. Biosignaling

Insulin

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Multiple Choice

Which hormone is secreted from the alpha cells of the pancreas in response to decreased blood glucose levels?

Amylin

Somatostatin

Insulin

Glucagon

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Verified step by step guidance

Understand the role of the pancreas in regulating blood glucose levels. The pancreas contains specialized cells called islets of Langerhans, which include alpha cells, beta cells, and delta cells. Each cell type secretes specific hormones.

Recall that alpha cells of the pancreas are responsible for secreting glucagon, a hormone that plays a key role in increasing blood glucose levels when they are low.

Learn the function of glucagon: It stimulates glycogenolysis (breakdown of glycogen into glucose) and gluconeogenesis (production of glucose from non-carbohydrate sources) in the liver, thereby raising blood glucose levels.

Differentiate glucagon from other hormones mentioned in the options: Amylin is secreted by beta cells and regulates glucose absorption; somatostatin is secreted by delta cells and inhibits the release of other hormones; insulin is secreted by beta cells and lowers blood glucose levels.

Conclude that glucagon is the hormone secreted by alpha cells of the pancreas in response to decreased blood glucose levels, as it directly counteracts hypoglycemia by increasing glucose availability.