When the concentraion of solution is greater outside the cells then inside the cells,the solution outside the cells is

Options

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

Answer

To solve the question, "When the concentration of solution is greater outside the cells than inside the cells, the solution outside the cells is:", we need to understand the concepts of tonicity and osmotic pressure.

### Step-by-Step Solution:

1. **Understanding Tonicity**: Tonicity refers to the relative concentration of solutes in two solutions separated by a semi-permeable membrane. It helps to determine the direction of water movement.

2. **Identifying the Conditions**: The question states that the concentration of the solution is greater outside the cells than inside. This indicates that the external solution has a higher solute concentration compared to the cytosol (the fluid inside the cell).

3. **Defining Hypertonic Solution**: A solution that has a higher concentration of solutes compared to another solution is termed as hypertonic. In this case, since the external solution has a greater concentration of solutes than the cytosol, it is classified as hypertonic.

4. **Effect on Cells**: When a cell is placed in a hypertonic solution, water will move out of the cell into the surrounding solution to balance the concentration of solutes on both sides of the membrane. This can lead to cell shrinkage.

5. **Conclusion**: Based on the definitions and effects discussed, the correct answer to the question is that the solution outside the cells is **hypertonic**.

### Final Answer:
The solution outside the cells is **hypertonic**.

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