GCSE Biology, movement of cells summary

Movement of substances summary

They are three different types of movements of particles that you need to know for your exam:

·         Diffusion

·         Osmosis

·         Active transport [this is TRIPLE AWARD only.]

Diffusion this is the movement of particles from an area of high concentration to an area of low concentration. It happens randomly and it crosses a partially permeable membrane.

This is either in a gas or a dissolved substance.

It happens in the lungs mainly in the human body.

The way diffusion is sped up:

1.    Heat --> this gives particles energy to move.

2.    Concentration…