[Campbell Biology P.965] What are the primary roles of insulin and glucagon in maintaining g... | Practice Question

What are the primary roles of insulin and glucagon in maintaining glucose homeostasis, and which specific types of pancreatic cells produce these hormones?

  • A: Insulin raises blood glucose, produced by alpha cells; Glucagon lowers blood glucose, produced by beta cells.
  • B: Insulin lowers blood glucose, produced by beta cells; Glucagon raises blood glucose, produced by alpha cells.
  • C: Both insulin and glucagon lower blood glucose, both produced by beta cells.
  • D: Insulin raises blood glucose, produced by beta cells; Glucagon lowers blood glucose, produced by alpha cells.

Explanation

Insulin, secreted by pancreatic beta cells, lowers blood glucose by promoting glucose uptake and storage. Glucagon, secreted by pancreatic alpha cells, raises blood glucose by stimulating the release of glucose from energy stores, primarily the liver.