GCSE Biology – Osmosis in the body

Last updated: 28/04/2020
OCR Gateway GCSE Science – Biology higher Maintaining internal environments GCSE Biology – Osmosis in the body

Learning Objectives

-I can describe the effect osmosis has on cells
-I can describe how water leaves and enters the body
-I can describe what happens to cells if they lose or gain too much water

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  1. Current
  2. Review
  3. Answered

  1. What is osmosis?

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  2. What makes osmosis different from diffusion?

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  3. What must be there for osmosis to occur?

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  4. For what solutions does osmosis work?

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  5. What type of process is osmosis?

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  6. Does osmosis require energy?

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  7. Osmosis is a passive process. What does this mean?

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  8. Why does osmosis not work when both sides have equal concentrations?

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  9. What does a lower water concentration in a solution mean?

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  10. What does turgid mean?

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  11. What do cells contain that allows osmosis to occur?

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  12. What is needed for osmosis to occur across a membrane?

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  13. What membrane allows osmosis to occur?

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  14. Is osmosis possible across living cells?

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  15. What happens to a cell when it is in pure water?

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  16. What happens to a cell when it is in a concentrated solution?

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  17. How is water lost from the lungs?

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  18. How is water lost from the skin?

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  19. Is there control over water loss by the skin and lungs?

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  20. As well as the skin, where else is excess water, ions and urea removed?

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  21. What is lost from the skin as sweat?

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  22. What happens to red blood cells if they lose too much water to osmosis?

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  23. What happens to red blood cells if they gain too much water from osmosis?

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  24. Why do concentrations of body fluids have to be kept within strict limits for animals?

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  25. Why is a dilute solution more detrimental for animal cells than plant cells?

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