Movement in and out of cells

Question 1

Diffusion

Answer 1

The net movement
of particles from a region of their higher
concentration to a region of their lower
concentration down a concentration gradient,
as a result of their random movement

Question 2

Osmosis

Answer 2

The net movement of
water molecules from a region of higher water
potential (dilute solution) to a region of lower
water potential (concentrated solution), through
a partially permeable membrane

Question 3

Active transport

Answer 3

The movement
of particles through a cell membrane from
a region of lower concentration to a region
of higher concentration using energy from
respiration