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Multiple Choice
Which of the following is a function of glucagon?
A
Increase blood glucose levels
B
Promote glycogen synthesis
C
Decrease blood glucose levels
D
Stimulate insulin secretion
Verified step by step guidance
1
Understand the role of glucagon in the body: Glucagon is a hormone produced by the alpha cells of the pancreas. Its primary function is to regulate blood glucose levels, especially during fasting or between meals.
Identify the mechanism of action: Glucagon works by stimulating the liver to convert stored glycogen into glucose, which is then released into the bloodstream. This process is known as glycogenolysis.
Consider the physiological effect: By promoting glycogenolysis, glucagon effectively increases blood glucose levels, providing energy to the body when it is needed.
Differentiate from insulin: Insulin, another hormone produced by the pancreas, has the opposite effect of glucagon. It promotes the uptake of glucose by cells and encourages glycogen synthesis, thereby decreasing blood glucose levels.
Evaluate the options: Given the function of glucagon, the correct answer is 'Increase blood glucose levels,' as it does not promote glycogen synthesis, decrease blood glucose levels, or stimulate insulin secretion.