Question

Turgor pressure becomes equal to wall pressure then
a. Water leaves the cell
b. No exchange of water takes place
c. Water enter the cell
d. Solutes goes from cell into water

Answer 1

Turgor pressure is the pressure that is exerted by fluid in a cell that holds the cell membrane against the cell wall. Wall pressure is the pressure that is exerted on the contents of a plant cell by the cell wall that is equal and opposite to that of the force of the turgor pressure.

Complete answer:
- If wall pressure is equal to the turgor pressure, then no exchange of water takes place.
- The pressure that is developed in a cell from time to time due to the osmotic diffusion of water molecules into a cell that is causing the stretching of the cell wall is called turgor pressure.
- The rigid cell wall provides resistance because of the turgor pressure. The resistance offered by the cell wall works in the direction opposite to turgor pressure.
- Since the pressure is equal to the turgor pressure it is called wall pressure.
- Due to this there is no exchange of water that is taking place.

Hence, the correct answer is option (B).

Note: The turgor pressure is also named as the hydrostatic pressure and it is defined as fluid measured pressure that is measured at a certain point by itself when it is in equilibrium. A good example for turgor pressure will be to imagine a balloon that is being filled with water. As the balloon swells more water is drawn in. The pressure that is created by the water against the walls of the balloon is very similar to the turgor pressure that is exerted against the wall. The Turgor pressure is a result of the osmotic flow of water and occurs in plants, fungi, and bacteria.