Which is corret

Options

A. Glucagon and isulin are secreted by same cells
B. Glucagon and insulin are secreted by different cells.
C. Glucagon and insulin are secreted by different cells and have opposite effect.
D. None of the above

Answer

To determine which statement about glucagon and insulin is correct, we can analyze each option step by step:

### Step 1: Understand the secretion of glucagon and insulin
- **Glucagon** is secreted by the **alpha cells** of the **islets of Langerhans** in the pancreas.
- **Insulin** is secreted by the **beta cells** of the **islets of Langerhans** in the pancreas.

### Step 2: Evaluate the first option
- The first option states that glucagon and insulin are secreted by the same cells.
- Since glucagon is produced by alpha cells and insulin by beta cells, this statement is **incorrect**.

### Step 3: Evaluate the second option
- The second option states that glucagon and insulin are secreted by different cells.
- This statement is **correct** because glucagon comes from alpha cells and insulin comes from beta cells.

### Step 4: Evaluate the third option
- The third option states that glucagon and insulin are secreted by different cells and have opposite effects.
- This is also **correct**. Glucagon increases blood sugar levels, while insulin decreases blood sugar levels. Therefore, they have opposite effects.

### Conclusion
- The most comprehensive and correct answer is the third option: **"Glucagon and insulin are secreted by different cells and have opposite effects."**

### Final Answer
The correct statement is: **Glucagon and insulin are secreted by different cells and have opposite effects.**

---