2) Movement in and out of the cell

Question 1

Diffusion

Answer 1

Movement of molecules from area of high concentration to low concentration due to random movement of molecules

Question 2

Factors affecting diffusion

Answer 2

1. Surface area
2. Thickness of membrane
3. Temperature
4. Size of molecules
5. Concentration gradient

Question 3

Osmosis

Answer 3

Diffusion of water molecules from area of high water potential to low water potential through a partially permeable membrane

Question 4

Active transport

Answer 4

Movement of molecules from area of low to high concentration against the concentration gradient using energy through carrier proteins