Which of the following cells secrete insulin?

Correct answer: D. Beta cells

  • A. Alpha cells
  • B. Delta cells
  • C. Nerve cells
  • D. Beta cells

Explanation

Beta cells in the islets of Langerhans secrete insulin, which lowers blood glucose by promoting glucose uptake and storage. Alpha cells secrete glucagon, while delta cells secrete somatostatin. Students may choose alpha cells because they are also pancreatic endocrine cells involved in glucose regulation, but their hormone has the opposite main effect.

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