Cell transport and diffusion

Passive transport

Transport that takes place as a result of concentration, pressure or electrochemical gradients and involves no energy from a cell.

Active transport

The movement of substances into or out of the cell using ATP which is produced during cellular respiration

Diffusion

The movement of the particles in a liquid or gas down a concentration gradient from an area where they are at a relatively high concentration to an area where they are relative low concentration.

Facilitated diffusion

Diffusion that takes place through carrier proteins or protein channels.

Osmosis

A specialised form of diffusion that involves the movement of solvent molecules down their water potential gradient.