IMPORTANT THINGS FOR UNIT TEST ON CELLS

Question 1

diffusion

Answer 1

is the movement of molecules from an area of high concentration to an area of low concentration

Question 2

osmosis

Answer 2

fancy word for the diffusion of water. it is the process by which cells take in water or lose water and it helps them maintain proper balance.

Question 3

cell membrane

Answer 3

acts as a gate keeper to the cell, controls what enters and leaves. because it only allows certain substances to enter or leave, but not others, it is said to be selectively permeable it looks like a plastic bag