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Sensory, Motor and Relay neurones
The brain and the spinal cord
Osmosis is the diffusion of water from a dilute solution to a concentrated solution across a partially permeable membrane.
Terms: Diffusion (the net movement of particles from a high to a...
There are a number of reasons why it is necessary to open and close the air vents. These include; allowing oxygen in, which is also necessary for respiration and allowing heat to escape. Closing the ai...
For the exams, the definition you will need to know is that "diffusion is the net movement of a substance from an area of high concentration to an area of low concentration, down a diffusion gradi...
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