What happens to a cell when there is a higher con centration of cell tha no de? a) Water moves into the cell by osmosis a. b. b) Water moves out of the cell by osmosis c. c) The cell becom es turgid d d) The cell bursts d. d)owyoen moving from leaf cells to air space in the leaf 8. What is the role of the central vacuole in plant cells? a) To store nutrients b. b) To store water c. c) To produce energy d. d) To transport oxygen m e or False 9. Diffusion requires energy input from the cell. 10. Osmo sis can cause a cell to burst If too much w water enters the cell. 11. Plant ro ots absorb wa ter from the soil by osmosis. 12. The co ncentra tion of solutes inside a cell does not affect osmosis. 13. Diffusion always occurs down a co ncentration gra dient. 14. Osmosis is not a type of diffusio n. 15. When water enters a cell faste than it lea res, the cell incr eases in size. 16. Osmosis stops when the con centration of water is equal on both sides of the r 17. Explain why osmosis is important for maintaining cell size and shape. 18. Explain the role of diffusion in cells.

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What happens to a cell when there is a higher con centration of cell tha no de? a) Water moves into the cell by osmosis a. b. b) Water moves out of the cell by osmosis c. c) The cell becom es turgid d d) The cell bursts d. d)owyoen moving from leaf cells to air space in the leaf 8. What is the role of the central vacuole in plant cells? a) To store nutrients b. b) To store water c. c) To produce energy d. d) To transport oxygen m e or False 9. Diffusion requires energy input from the cell. 10. Osmo sis can cause a cell to burst If too much w water enters the cell. 11. Plant ro ots absorb wa ter from the soil by osmosis. 12. The co ncentra tion of solutes inside a cell does not affect osmosis. 13. Diffusion always occurs down a co ncentration gra dient. 14. Osmosis is not a type of diffusio n. 15. When water enters a cell faste than it lea res, the cell incr eases in size. 16. Osmosis stops when the con centration of water is equal on both sides of the r 17. Explain why osmosis is important for maintaining cell size and shape. 18. Explain the role of diffusion in cells.

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Let's break down these questions about osmosis and diffusion. 1. **What happens to a cell when there is a higher concentration of solute *outside* the cell than inside?** The correct answer is **b) Water moves out of the cell by osmosis.** Water always moves from an area of high water concentration (low solute concentration) to an area of low water concentration (high solute concentration). In this case, the inside of the cell has a higher water concentration, so water moves out. 2. **What is the role of the central vacuole in plant cells?** The correct answer is **b) To store water.** While the vacuole can store nutrients, its primary role is water storage. This helps maintain turgor pressure, which gives the plant cell its shape and support. **True or False:** 9. **False.** Diffusion is a passive process, meaning it doesn't require energy from the cell. 10. **True.** In animal cells especially, excessive water influx can cause the cell to burst (lyse) because they lack a cell wall. Plant cells, with their cell walls, become turgid but generally don't burst. 11. **True.** Root cells typically have a higher solute concentration than the surrounding soil, leading to water uptake by osmosis. 12. **False.** The concentration of solutes inside and outside the cell is the driving force for osmosis. 13. **True.** Diffusion always moves substances from areas of high concentration to areas of low concentration. 14. **False.** Osmosis is a *specific type* of diffusion, specifically the diffusion of water across a selectively permeable membrane. 15. **True.** When water enters faster than it leaves, the cell swells. 16. **True.** Osmosis continues until equilibrium is reached, meaning the water concentration is equal on both sides of the membrane. More accurately, it continues until the *water potential* is equal on both sides. **Short Answer:** 17. **Explain why osmosis is important for maintaining cell size and shape.** Osmosis is crucial for maintaining cell size and shape because it controls the water balance within the cell. In plant cells, the influx of water into the central vacuole creates turgor pressure, which pushes against the cell wall, maintaining the cell's firmness and preventing wilting. In animal cells, osmosis helps maintain a stable cell volume, preventing shrinking or bursting. 18. **Explain the role of diffusion in cells.** Diffusion is essential for many cellular processes because it allows for the movement of substances in and out of the cell. It plays a vital role in: * **Gas exchange:** Oxygen and carbon dioxide diffuse across cell membranes for respiration and photosynthesis. * **Nutrient uptake:** Cells absorb nutrients from their surroundings through diffusion. * **Waste removal:** Metabolic waste products diffuse out of cells. * **Signal transduction:** Some signaling molecules diffuse between cells to communicate. It's important to remember that both osmosis and diffusion are passive transport processes, meaning they don't require the cell to expend energy. They rely on the random movement of molecules and the tendency for substances to move from areas of high concentration to areas of low concentration.

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