Movement of substances in and out of the cell

Question 1

Definition of diffusion

Answer 1

Diffusion is the movement of a substance from a region of higher concentrationto a region of lower concentration.

Question 2

Definition of osmosis

Answer 2

Water molecules move from areas of high water concentration to areas of low water concentration through a selectively permeable membrane.

Question 3

Definition of active transport

Answer 3

The movement of particles against the concentration gradient, this requires the use of energy and a special protein