Movement of substances summary
They are three different types of movements of particles that you need to know for your exam:
· 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.