💧 Osmosis & Water Movement
This quiz explores osmosis—the movement of water molecules across semi-permeable membranes in response to differences in solute concentration. You'll examine hypertonic, hypotonic, and isotonic solutions, their effects on plant and animal cells, plasmolysis, turgor pressure, and how osmosis maintains cell homeostasis. Realistic scenarios help you understand why cells regulate water balance to stay healthy. **What you'll learn:** - The definition and mechanism of osmosis in cells - How to identify hypertonic, hypotonic, and isotonic solutions - The effects of osmosis on plant and animal cells - How plasmolysis and turgor pressure relate to cell function - The role of osmosis in maintaining cellular homeostasis
Questions in this quiz
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- Question 1
Which of the following best describes osmosis?
- Question 2
In a hypertonic solution, a plant cell will lose water and its cell membrane will shrink away from the cell wall, a process called plasmolysis.
- Question 3
What happens to an animal cell placed in a hypotonic solution?
- Question 4
A plant cell in an isotonic solution will:
- Question 5
Turgor pressure is the outward pressure exerted by the cell contents against the cell wall, and it helps keep plant cells firm and upright.
- Question 6
Why does a semi-permeable membrane allow water molecules to pass through but not solute particles?
- Question 7
If a plant cell is placed in a hypertonic solution and water leaves the cell, what is the relationship between plasmolysis and turgor pressure?
- Question 8
Osmosis is an active process that requires energy from the cell to move water molecules across the membrane.
- Question 9
Which solution would cause red blood cells (which lack a cell wall) to undergo crenation (shrivelling)?
- Question 10
A gardener notices that a potted plant is wilting despite having moist soil. Which explanation involving osmosis best describes what might be happening?
- Question 11
When a plant cell is placed in a hypotonic solution and water enters the cell, the cell wall prevents the cell from bursting by resisting the outward pressure.
- Question 12
How does osmosis help maintain cell homeostasis?
- Question 13
In a living plant, the cytoplasm of a cell in an isotonic environment is pushed against the cell wall by turgor pressure. What is the most likely result if this plant is suddenly watered with salt water (hypertonic solution)?
- Question 14
Plasmolysis can be reversible if the plant cell is returned to an isotonic or hypotonic solution before damage occurs.
- Question 15
Which of the following scenarios demonstrates the principle of osmosis working to maintain cell water balance?
- Question 16
Why is the semi-permeable nature of the cell membrane essential for osmosis to occur?