Question

In a hypertonic solution, a cell's water pressure

• A. Increases
• B. First increases and then decreases
• C. Decreases
• D. Does not change

Answer 1

The correct option is C

Decreases

The correct option is C.

Explanations for correct option:

1. A hypertonic solution is a solution with more solute contents and less solvent concentration.
2. When a cell is placed in a hypertonic solution the water will move from high concentration to low concentration.
3. The cell has a higher concentration of water inside the cell than the hypertonic solution, hence water moves from the cell into the hypertonic solution.
4. The water molecules, therefore, move out of the cell.
5. Hence, the cell loses water and gets flaccid.
6. This decreases the water pressure inside the cell.
7. Therefore, In a hypertonic solution, a cell's water pressure decreases.

Explanation for incorrect options:

Option A:

In a hypertonic solution, the cell will get flaccid and water molecules move out of the cell and the water pressure is not increased but decreased.

Option B:

The water pressure will not increase first because water moves out of the cell.

Option D:

Before placing the cell in a hypertonic solution the water pressure is higher but after placing it decreases (changes).

Final answer: In a hypertonic solution, a cell's water pressure decreases.