What is Diffusion?

Diffusion is...

...the spreading out of particles from an area of higher concentration to an area of lower concentration.

In the cell membrane oxygen, glucose, water and amino acids can diffuse through but bigger molecules such as starch and proteins cannot.

What is Osmosis?

Osmosis is...

...the movement of water molecules across a partially permeable membrane from a region of higher water concentration to a region of lower water concentration.

What is Active Transport?

Active Transport is...

...when substances are absorbed against the concentration gradient from an area of lower concentration to an area of higher concentration.

Quick Quiz

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