Pressure on a plant cell wall caused by osmotic movement of water is called

Options

A. osmotic pressure
B. wall pressure
C. turgor pressure
D. tonic pressure

Answer

To solve the question regarding the pressure on a plant cell wall caused by osmotic movement of water, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding Osmosis**:
- Osmosis is the movement of water across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration. In plants, this typically occurs when a cell is placed in a hypotonic solution.

**Hint**: Recall that osmosis involves the movement of water and is influenced by solute concentrations.

2. **Identifying the Solution Type**:
- When a plant cell is placed in a hypotonic solution, water moves into the cell. This is known as endosmosis.

**Hint**: Think about what happens to a cell when it is surrounded by a solution that has a lower concentration of solutes.

3. **Effect of Water Movement**:
- As water enters the plant cell, it causes the cell to swell. This swelling exerts pressure against the rigid cell wall of the plant.

**Hint**: Consider the relationship between water entering a cell and the pressure it exerts on the cell wall.

4. **Defining the Pressure**:
- The pressure exerted by the fluid (water) inside the cell against the cell wall due to this influx of water is known as turgor pressure.

**Hint**: Remember that turgor pressure is vital for maintaining the structural integrity and rigidity of plant cells.

5. **Eliminating Incorrect Options**:
- The other options provided (osmotic pressure, wall pressure, tonic pressure) do not accurately describe this phenomenon.
- Osmotic pressure refers to the pressure required to prevent water from moving into a solution.
- Wall pressure is not a commonly used term in this context.
- Tonic pressure is not a standard term used in plant physiology.

**Hint**: Compare the definitions of the terms to see which one aligns with the concept of pressure from water movement in plant cells.

### Final Answer:
The pressure on a plant cell wall caused by osmotic movement of water is called **turgor pressure**.