4.0 Transport across cell membranes

Question 1

What is diffusion

Answer 1

The net movement of molecules or ions from a region where they are more highly concentrated to one where their concentration is lower until evenly distributed

Question 2

What is osmosis

Answer 2

The passage of water from a region where it has a higher water potential to a region where it has a lower water potential through a selectively permeable membrane

Question 3

What is active transport

Answer 3

The movement of molecules or ions into or out of a cell from a region of lower concentration to a region of higher concentration using ATP.