Year 7

3. Name the process by which substances enter and leave cells because of a difference in concentration
6. What is the job of the respiratory system?
7. Where in a cell do all the chemical reactions take place?
9. What is the function of the nucleus?
12. Which organ system contains the stomach and large and small intestine?
13. Which part of the cell controls what enters and leaves the cell?
15. Give an example of a unicellular organism
16. Name the air sacs at the end of the bronchioles inside the lungs
17. Put these into order of size, smallest first: tissue, nucleus, cell, organ
19. Which 3 structures are found in most plant cells but not in animal cells?

1. How does a good blood supply around the air sacs speed up diffusion?
2. What do groups of similar cells form?
4. How do you bring cells into view when looking down the microscope?
5. Why should you always start with the lowest magnification on a microscope?
8. What is a “unicellular organism”?
10. How can you tell that the cell is a plant cell?
11. Why do plant cells have cell walls?
14. How do folded membranes on structures inside the body speed up diffusion?
18. Why do palisade cells contain lots of chloroplasts?