Which hormone secreted by the beta cells of the islets of Langerhans in the pancreas lowers blood glucose concentration?
Answer and explanation
Correct answer: D. Insulin
- Step 1: When blood glucose levels rise following a meal, pancreatic beta cells secrete insulin.
- Step 2: Insulin stimulates cellular glucose uptake and promotes glycogen synthesis in the liver and skeletal muscle, lowering blood glucose levels back to normal range.
Answer
Insulin.
Why not the others: 'Glucagon' is secreted by alpha cells and raises blood glucose; 'Cortisol' is a glucocorticoid from the adrenal cortex that increases glucose via gluconeogenesis; 'Epinephrine' stimulates glycogenolysis during stress.
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