Insulin acts upon:

Options

A. Hepatocytes but no effect on adipocytes
B. Adipocytes but no effect on hepatocytes
C. Hepatocytes and adipocytes both
D. Neither hepatocytes nor on adipocytes

Answer

**Step-by-Step Solution:**

1. **Understanding Insulin:**
- Insulin is a hormone produced by the pancreas, specifically by the beta cells in the islets of Langerhans. It plays a crucial role in regulating blood glucose levels.

**Hint:** Remember that insulin is produced in the pancreas and is essential for glucose metabolism.

2. **Identifying Target Cells:**
- The primary target cells for insulin are hepatocytes (liver cells) and adipocytes (fat cells). Insulin facilitates the uptake of glucose by these cells.

**Hint:** Think about where glucose is stored and utilized in the body.

3. **Function of Insulin:**
- Insulin enhances glucose uptake in the body, meaning it helps cells absorb glucose from the bloodstream. This is vital for maintaining normal blood sugar levels.

**Hint:** Insulin's main function is to lower blood sugar levels by promoting glucose uptake.

4. **Evaluating the Options:**
- The question provides four options regarding the action of insulin:
a) Acts upon hepatocytes but no effect on adipocytes
b) Acts upon adipocytes but no effect on hepatocytes
c) Acts upon both hepatocytes and adipocytes
d) Neither hepatocytes nor adipocytes

**Hint:** Consider which cells are known to respond to insulin.

5. **Selecting the Correct Answer:**
- Since insulin acts on both hepatocytes and adipocytes to promote glucose uptake, the correct answer is option (c) - "hepatocytes and adipocytes both."

**Hint:** Look for the option that includes both types of cells as targets for insulin action.

**Final Answer:**
Insulin acts upon both hepatocytes and adipocytes.

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