Cells

3. What name is given to the process where particles in a gas or liquid spread from an area of higher concentration to an area of lower concentration?
5. Which part of a cell is where most of the chemical reactions happen?
7. ______ dioxide diffuses out of cells into the blood plasma.
9. A small section of a chromosome that codes for a protein is known as what?
12. Which cells are specialised for contraction and contain lots of mitochondria to transfer the energy needed for contraction?
14. Where do most of the chemical reactions for aerobic respiration happen within cells?
15. Which cells (animal or plant) lose the ability to differentiate (become specialised) early on?
16. Which part of a cell controls what goes in and out of the cell?
19. What structures increase the surface area of the small intestine in order to maximise the absorption of nutrients?

1. Where are chromosomes found in human cells?
2. Where are proteins made in cells?
4. The larger the surface area the _____________ the diffusion rate is, because more particles can pass through at once.
6. Plant and animal cells are examples of which type of cell?
8. Which specialised animal cell has a tail which enables it to swim?
10. What term is used to describe a cell that has features which enable it to carry out a specific function?
11. What are there millions of in the lungs which increase surface area and maximise the diffusion of oxygen into the blood?
13. These cells that are undifferentiated and can produce specialised cells.
17. Which specialised animal cells carry electrical signals from one part of the body to another?
18. There are fourty .... sets of chromosomes in body cells.