Alpha-cells of pancreas secrete …………….. while Beta cells of pancreas secrete ……………… .

Explanation

**Step-by-Step Solution:**

1. **Identify the Cells of the Pancreas**: The pancreas contains specialized cells known as alpha cells and beta cells.

2. **Function of Alpha Cells**: Alpha cells are responsible for secreting a hormone called glucagon. This hormone plays a crucial role in regulating blood sugar levels by increasing them when they are too low.

3. **Function of Beta Cells**: Beta cells, on the other hand, secrete insulin. Insulin is essential for lowering blood sugar levels by facilitating the uptake of glucose into the cells.

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