Cells

2. These cells that are undifferentiated and can produce specialised cells.
6. What structures increase the surface area of the small intestine in order to maximise the absorption of nutrients?
7. What are there millions of in the lungs which increase surface area and maximise the diffusion of oxygen into the blood?
9. Where are proteins made in cells?
14. ______ dioxide diffuses out of cells into the blood plasma.
15. Which part of a cell is where most of the chemical reactions happen?
17. Which specialised animal cell has a tail which enables it to swim?
18. Where do most of the chemical reactions for aerobic respiration happen within cells?
19. A small section of a chromosome that codes for a protein is known as what?

1. Which part of a cell controls what goes in and out of the cell?
3. There are fourty .... sets of chromosomes in body cells.
4. 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 specialised animal cells carry electrical signals from one part of the body to another?
8. Plant and animal cells are examples of which type of cell?
10. What term is used to describe a cell that has features which enable it to carry out a specific function?
11. The larger the surface area the _____________ the diffusion rate is, because more particles can pass through at once.
12. Where are chromosomes found in human cells?
13. Which cells are specialised for contraction and contain lots of mitochondria to transfer the energy needed for contraction?
16. Which cells (animal or plant) lose the ability to differentiate (become specialised) early on?