Cell Membrane

2. reverse direction of endocytosis
4. this type of transport doesn't require energy to force the molecule in the cell
7. large ___ are very important to make the cell wall for plants
9. molecules move from ___ concentration to low concentration
11. energy that is required to do the reverse, go from low energy to high energy
13. these proteins act as channels
14. this is how many layers the cell membrane contains
15. when the cell membrane fuses with the molecules it's letting in

1. to keep a stable environment within the cell
3. the tail part of the membrane is ____
5. this type of diffusion is when the molecules need help getting across to the cell
6. the head of the membrane is _____
8. controls what goes in and out of the cell, All cells contain this
10. stretch around what it wants to engulf then pulls it into a vacuole
12. allows cells to take in fluids