Osmosis and Tonicity Worksheet
A Grade 12 Biology worksheet covering the principles of osmosis, water potential, and tonicity in biological systems.
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Osmosis and Tonicity Worksheet
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Read each question carefully and provide concise, accurate answers. For diagrams, label all indicated parts.
1. Osmosis is the net movement of across a selectively permeable membrane from an area of high water concentration to an area of low water concentration.
2. A solution with a higher solute concentration than the cell's cytoplasm is called a solution.
3. In a hypotonic solution, an animal cell will undergo , where it swells and may burst.
4. Plant cells in a hypertonic solution experience , where the plasma membrane pulls away from the cell wall.
5. Water potential is the potential energy of water per unit volume relative to pure water in reference conditions. It is influenced by solute potential and potential.
1. Which of the following best describes the movement of water in a plant cell placed in a hypotonic solution?
Water moves out of the cell, causing plasmolysis.
Water moves into the cell, causing turgor pressure to increase.
There is no net movement of water.
The cell bursts due to excessive water intake.
2. If a red blood cell is placed in a hypertonic solution, what will happen to the cell?
It will swell and burst.
It will shrink and crenate.
It will remain unchanged.
It will actively transport water out of the cell.
1. Describe the concept of water potential and explain how solute concentration affects it.
2. Explain why a plant cell does not burst when placed in a hypotonic solution, unlike an animal cell.
Observe the following diagram illustrating different tonicity conditions for an animal cell and a plant cell. Then answer the questions below.
1. In which solution does the animal cell exhibit lysis? Why does this occur?
2. What is the condition of the plant cell in an isotonic solution? How does this differ from an animal cell in the same solution?
1. A patient is severely dehydrated and needs intravenous fluids. Explain why administering pure distilled water intravenously would be dangerous, and what type of solution should be used instead, justifying your answer using principles of osmosis and tonicity.