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Surface area to volume ratio and exchange

8th grade (Year 9 in England) · 16 questions · Common Core: NGSS.HS-LS1-2, NGSS.SEP 5 · England: GCSE Combined Science: Cell biology (exchange surfaces)

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Date

Score/ 16

  1. Question 1

    Exchange surfaces: which statement is NOT true?

    • A. Villi increase the surface area of the small intestine.
    • B. Smaller objects have a larger surface area to volume ratio.
    • C. Single-celled organisms need lungs.
    • D. Fish gills have many thin filaments to increase surface area.

  2. Question 2

    A cube-shaped cell model has sides of 6 cm. What is its surface area to volume ratio, written as ? : 1?

    Answer

  3. Question 3

    An elephant has a much smaller surface area to volume ratio than a mouse. What problem does this cause?

    • A. Getting too little food
    • B. Losing heat quickly enough
    • C. Losing heat too quickly
    • D. Moving too fast

  4. Question 4

    Exchange surfaces: which statement is NOT true?

    • A. Large animals need transport systems to reach all their cells.
    • B. Single-celled organisms need lungs.
    • C. Villi increase the surface area of the small intestine.
    • D. Smaller objects have a larger surface area to volume ratio.

  5. Question 5

    A cube-shaped cell model has sides of 6 cm. What is its surface area to volume ratio, written as ? : 1?

    Answer

  6. Question 6

    An elephant has a much smaller surface area to volume ratio than a mouse. What problem does this cause?

    • A. Losing heat too quickly
    • B. Getting too little food
    • C. Losing heat quickly enough
    • D. Moving too fast

  7. Question 7

    Exchange surfaces: which statement is NOT true?

    • A. Large animals need transport systems to reach all their cells.
    • B. A larger cube has a larger surface area to volume ratio.
    • C. Villi increase the surface area of the small intestine.
    • D. Fish gills have many thin filaments to increase surface area.

  8. Question 8

    A cube-shaped cell model has sides of 3 cm. What is its surface area to volume ratio, written as ? : 1?

    Answer

  9. Question 9

    Why does a large multicellular animal need lungs and a heart, but an amoeba does not?

    • A. Its small SA:V ratio and long distances mean diffusion alone is too slow
    • B. Amoebae are not alive
    • C. Diffusion is faster in big animals
    • D. Large animals do not use oxygen

  10. Question 10

    Exchange surfaces: which statement is NOT true?

    • A. Villi increase the surface area of the small intestine.
    • B. Fish gills have many thin filaments to increase surface area.
    • C. Thick walls make exchange surfaces work better.
    • D. Large animals need transport systems to reach all their cells.

  11. Question 11

    A cube-shaped cell model has sides of 2 cm. What is its surface area to volume ratio, written as ? : 1?

    Answer

  12. Question 12

    Why does a large multicellular animal need lungs and a heart, but an amoeba does not?

    • A. Its small SA:V ratio and long distances mean diffusion alone is too slow
    • B. Amoebae are not alive
    • C. Large animals do not use oxygen
    • D. Diffusion is faster in big animals

  13. Question 13

    Exchange surfaces: which statement is NOT true?

    • A. Large animals need transport systems to reach all their cells.
    • B. A larger cube has a larger surface area to volume ratio.
    • C. Fish gills have many thin filaments to increase surface area.
    • D. Smaller objects have a larger surface area to volume ratio.

  14. Question 14

    A cube-shaped cell model has sides of 1 cm. What is its surface area to volume ratio, written as ? : 1?

    Answer

  15. Question 15

    Why are the alveoli in the lungs so numerous and tiny?

    • A. to give a huge surface area for gas exchange
    • B. to store air for later
    • C. to make the lungs heavier
    • D. to filter out food

  16. Question 16

    Exchange surfaces: which statement is NOT true?

    • A. Smaller objects have a larger surface area to volume ratio.
    • B. A larger cube has a larger surface area to volume ratio.
    • C. Large animals need transport systems to reach all their cells.
    • D. Fish gills have many thin filaments to increase surface area.

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Answer key: Surface area to volume ratio and exchange

  1. 1. C. Single-celled organisms need lungs.

  2. 2. 1

  3. 3. B. Losing heat quickly enough

  4. 4. B. Single-celled organisms need lungs.

  5. 5. 1

  6. 6. C. Losing heat quickly enough

  7. 7. B. A larger cube has a larger surface area to volume ratio.

  8. 8. 2

  9. 9. A. Its small SA:V ratio and long distances mean diffusion alone is too slow

  10. 10. C. Thick walls make exchange surfaces work better.

  11. 11. 3

  12. 12. A. Its small SA:V ratio and long distances mean diffusion alone is too slow

  13. 13. B. A larger cube has a larger surface area to volume ratio.

  14. 14. 6

  15. 15. A. to give a huge surface area for gas exchange

  16. 16. B. A larger cube has a larger surface area to volume ratio.