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Carbon dioxide diffuses into the cell leaf through the stomata, and diffuses into the water surrounding the mesophyll cell walls (main site of photosynthesis-packed with many chloroplasts). From here, the...

Homeostasis is the maintaining of a constant internal environment to allow for healthy functioning of the body. Three examples would be the control of water levels in the kidney via ADH, control of temper...

Compartmentalisation - as different organelle's different metabolic reaction require different optimum environments such as pH and temperature. Site of chemical reactions such as photosynthesis or respira...

When an action potential is transmitted from one neurone to another it has to be sent across a small gap - called the synapse. Firstly, the action potent...

When an action potential reaches the presynaptic bouton, it causes an influx of calcium into the nerve cell ending. This, in turn, causes vesicles containing the neurotransmitter (acetylcholine) to move t...