Getting In And Out Of Cells

Question 1

Define diffusion

Answer 1

The net movement of solute from an area of high water concentration to low concentration across a partially permeable membrane.
Moves down concentration gradient.
Passive (no protein carrier needed)

Question 2

Define osmosis

Answer 2

The net movement of water molecules from an area of high solute concentration to low solute concentration
Passive

Question 3

Define active transport

Answer 3

The net movement of solute from low water concentration to high water concentration across a partially permeable membrane.
Requires a protein carrier, so uses energy