Which one of the following pairs is correctly matched w.r.t glucagon:-

Options

A. Converts glucose to glycogen
B. Converts glycogen to glucose
C. Decreases concentration of glucose in blood
D. None of the above

Answer

**Step-by-Step Solution:**

1. **Understanding Glucagon**: Glucagon is a hormone produced by the pancreas. Specifically, it is secreted by the alpha cells of the islets of Langerhans.

2. **Function of Glucagon**: The primary role of glucagon is to increase blood sugar levels. It does this by promoting the conversion of glycogen (stored glucose) into glucose, which then enters the bloodstream.

3. **Comparing with Insulin**: It is important to differentiate glucagon from insulin, which is another hormone produced by the pancreas but by the beta cells. Insulin's role is to decrease blood sugar levels by converting glucose into glycogen.

4. **Analyzing the Options**:
- **Option 1**: "Converts glucose into glycogen" - This is incorrect as it describes the action of insulin, not glucagon.
- **Option 2**: "Converts glycogen to glucose" - This is correct as it describes the action of glucagon.
- **Option 3**: "Decreases concentration of glucose in blood" - This is also incorrect as it describes the action of insulin.
- **Option 4**: "None of the above" - This is incorrect because we have identified a correct option.

5. **Conclusion**: The correct answer is that glucagon converts glycogen to glucose, thereby increasing blood sugar levels.

**Final Answer**: The correctly matched pair with respect to glucagon is: "Converts glycogen to glucose."

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