The external solution having more concentration then the cell sap is called

Options

A. Hypertonic solution
B. Isotonic solution
C. Hypotonic solution
D. None of the above

Answer

To answer the question "The external solution having more concentration than the cell sap is called," we need to analyze the options provided:

1. **Understanding the Terms**:
- **Hypotonic Solution**: A solution that has a lower concentration of solutes compared to the inside of the cell. In this case, water moves into the cell, causing it to swell.
- **Isotonic Solution**: A solution that has the same concentration of solutes as the inside of the cell. Here, water moves in and out at equal rates, maintaining cell size.
- **Hypertonic Solution**: A solution that has a higher concentration of solutes compared to the inside of the cell. Water moves out of the cell, leading to cell shrinkage.

2. **Analyzing the Question**:
- The question specifies that the external solution has a higher concentration than the cell sap. This means that the concentration of solutes outside the cell is greater than that inside the cell.

3. **Identifying the Correct Option**:
- Since the external solution has a higher concentration of solutes, it fits the definition of a **Hypertonic Solution**.

4. **Conclusion**:
- Therefore, the correct answer to the question is **Hypertonic Solution**.

### Final Answer:
The external solution having more concentration than the cell sap is called a **Hypertonic Solution**.

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