Question detail

How does glucagon function in the blood glucose control system?

Try the question, check the answer, then read the explanation to understand the curriculum point.

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At a glance

MCQ

Type

practice

Style

Topic

Hormonal coordination in humans

Question

A. It promotes the storage of glucose as glycogen.
B. It stimulates the conversion of glycogen back into glucose.
C. It increases the uptake of glucose by cells.
D. It decreases blood glucose levels.

Answer

The correct option is It stimulates the conversion of glycogen back into glucose.. This answer is correct because it matches the approved learning objective to explain (HT only) how insulin and glucagon interact in a negative feedback cycle to control blood glucose concentration in the subtopic Control of blood glucose concentration.

Explanation

The correct option is It stimulates the conversion of glycogen back into glucose.. It stimulates the conversion of glycogen back into glucose. is correct because it directly supports the approved learning objective to explain (HT only) how insulin and glucagon interact in a negative feedback cycle to control blood glucose concentration. This belongs to the subtopic Control of blood glucose concentration within Hormonal coordination in humans, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from Control of blood glucose concentration.

Common mistake

Misunderstanding Negative Feedback

Students often confuse the roles of insulin and glucagon in the negative feedback cycle, thinking that both hormones lower blood glucose levels.

Clarify that insulin lowers blood glucose levels by facilitating glucose uptake and storage, while glucagon raises blood glucose levels by promoting the conversion of glycogen to glucose in the liver.

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