Which hormone is primarily responsible for stimulating gluconeogenesis during

fasting?

A) Insulin

B) Glucagon

C) Epinephrine

D) Cortisol

Click to reveal answer

Answer: B. Glucagon

Explanation: Glucagon is secreted by the pancreas during fasting and stimulates

gluconeogenesis, the process of producing glucose from non-carbohydrate

sources, to maintain blood glucose levels.

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Day 116 MCAT Practice Question