Multiple Choice
Which of the following best describes osmosis, and what type of membrane transport does it represent?
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6. The Membrane
Osmosis
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What happens to a plant cell when it is placed into salt water?
A
Salt enters the cell, causing it to become turgid.
B
Water leaves the cell, causing it to shrink and the cell membrane to pull away from the cell wall (plasmolysis).
C
Water enters the cell, causing it to swell and possibly burst.
D
There is no net movement of water, and the cell remains unchanged.
Verified step by step guidance1
Understand the concept of osmosis: Osmosis is the movement of water across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.
Recognize the environment: Salt water is a hypertonic solution, meaning it has a higher solute concentration compared to the inside of the plant cell.
Predict water movement: In a hypertonic solution, water will move out of the plant cell to balance the solute concentration between the inside and outside of the cell.
Describe the effect on the plant cell: As water leaves the cell, the cell membrane shrinks and pulls away from the rigid cell wall, a process known as plasmolysis.
Conclude the outcome: The plant cell becomes dehydrated and loses turgor pressure, which is essential for maintaining its structure and function.
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