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Cells need to divide in order for an organism to grow. Cells can become damaged with time and so need a way to regenerate and produce new cells. There are certain stages throughout the process of cell div...
The hypothalamus is the processing centre in the brain that controls body temperature (constant temperature of 37ºC approx.). It triggers changes to effectors, such as sweat glands and muscles controlling...
An electrical impulse (action potential) travels along the axon of the pre-synaptic neuron. This causes the neuron to release chemical neurotransmitters which diffuse through the synaptic cleft and bind t...
-Atherosclerosis: hardening of blood vessels (specifically those that withstand high blood pressure, ie arteries.)
A mutation will randomly occur in individuals within a species, providing a larger variation in genes. This mutated gene may produce characteristics which are beneficial for the individual in their enviro...
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