BIOLOGY

Question 1

Simple diffusion

Answer 1

the passive net movement of a substance from a region of high concentration to a region of low concentration

Question 2

Osmosis

Answer 2

the net diffusion of free water molecules through a semi permeable membrane from a region with low solute concentration to a region of high solute concentration
doesn’t require energy

Question 3

Facilitated diffusion

Answer 3

the passive net movement of a substance from a region of high concentration to a region of low concentration through a membrane via specific channel or carrier protein
(diffusion through a protein channel)

Question 4

Active transport

Answer 4

the active net movement of a substance from a region with a low concentration to a region with a high concentration, through a membrane via carrier protein

example: uptake of glucose in the intestines in humans and the uptake of mineral ions into root hair cells of plants.