General Science • BiologyHard
What is the primary role of the hormone insulin secreted by the islets of Langerhans in the pancreas?
A. To stimulate glycogen breakdown and raise blood sugar levels
B. To promote cellular glucose uptake from the bloodstream and lower blood sugar levels✓ Correct Answer
C. To accelerate basal metabolic rate and stimulate protein synthesis
D. To regulate sodium ion retention and maintain blood pressure
💡 Solution & Explanation
Insulin is an anabolic peptide hormone secreted by beta cells of the pancreatic islets that facilitates glucose entry into liver, muscle, and fat cells, thereby lowering elevated blood glucose levels after meals. Glucagon performs the opposite function by stimulating glycogenolysis. Insulin deficiency leads to diabetes mellitus.
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