100% 4 Rated
Attempts 127

When does the pancreas secrete the most insulin?

  1. A
    When blood sugar falls
  2. B
    When blood sugar rises
  3. C
    Before food is consumed
  4. D
    After fat is burned

Topic Flashcards

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Question

Under what condition does the pancreas release the highest amount of insulin?

Answer

When blood glucose levels rise (e.g., after a meal), beta cells in the pancreas detect the increase and secrete large amounts of insulin to facilitate glucose uptake into cells and storage as glycogen or fat.

Question

What primary trigger causes peak insulin secretion from pancreatic beta cells?

Answer

A rise in blood sugar concentration stimulates insulin release; glucose enters beta cells, increases ATP, closes potassium channels, depolarizes the membrane, opens calcium channels, and triggers insulin granule exocytosis

Question

When is insulin secretion highest: low blood sugar or high blood sugar?

Answer

High blood sugar :- glucose is the primary stimulus; secretion is proportional to rising plasma glucose after meals.

Question

Does the pancreas secrete most insulin when blood glucose falls?

Answer

No:- low glucose suppresses insulin and stimulates glucagon instead; maximal secretion occurs only with elevated glucose.

Question

Which factor triggers the greatest insulin release from beta cells?

Answer

Elevated blood glucose which directly drives biphasic secretion (rapid first phase, sustained second) via GLUT2 uptake and metabolic signaling.

Question

Why does insulin surge after eating carbs?

Answer

Carbs raise blood glucose quickly; pancreas responds with high insulin output to promote uptake into cells and storage.

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Does the pancreas secrete most insulin when blood sugar rises?
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