When water enters into a cell what happens to it" OP, TP and DPD?

Options

A. OP & TP increase & its DPD increase
B. OP & DPD increase & TP decrease
C. TP & DPD decrease & OP increase
D. OP & DPD decrease & TP increase

Answer

### Step-by-Step Solution:

1. **Understanding the Terms**:
- **Osmotic Pressure (OP)**: This is the pressure required to prevent the flow of water into a solution via osmosis. It is determined by the concentration of solutes in the solution.
- **Turgor Pressure (TP)**: This is the pressure exerted by the fluid (water) inside the cell against the cell wall. It helps maintain the cell's shape and rigidity.
- **Diffusion Pressure Deficit (DPD)**: This is the difference between the osmotic pressure of the solution and the actual pressure in the cell. It indicates the potential for water to move into the cell.

2. **When Water Enters the Cell**:
- As water enters the cell, the volume of the cytoplasm increases, leading to an increase in turgor pressure (TP). This is because the water pushes the plasma membrane against the cell wall, creating pressure.

3. **Effect on Osmotic Pressure (OP)**:
- When water enters the cell, the concentration of solutes inside the cell decreases because the solute is diluted by the incoming water. As a result, the osmotic pressure (OP) decreases.

4. **Effect on Diffusion Pressure Deficit (DPD)**:
- DPD is calculated as the difference between osmotic pressure and turgor pressure (DPD = OP - TP). Since the osmotic pressure decreases and turgor pressure increases, the overall diffusion pressure deficit (DPD) will also decrease.

5. **Summary of Changes**:
- **Turgor Pressure (TP)**: Increases
- **Osmotic Pressure (OP)**: Decreases
- **Diffusion Pressure Deficit (DPD)**: Decreases

### Final Answer:
When water enters a cell:
- Turgor Pressure (TP) **increases**.
- Osmotic Pressure (OP) **decreases**.
- Diffusion Pressure Deficit (DPD) **decreases**.