Search over 10,000 free study notes

Cancer is a disease that occurs when cells get random changes in their genes, leading to them no longer being able to control how they grow and divide. This means the cancer cells grow and divide a lot qu...

Diffusion is a passive process, this means that no energy is required, where there is a net movement of particles from an area of high concentration to an area of low concentration down the concentration ...

We know red hair is recessive, so to have red hair you must have to have two red hair alleles, therefore Ben's genotype must be rr.However, the brown hair allele is dominant, this means you can have eithe...

Receptors in the skin which are sensitive to changes in pain, pressure and temperature detect a change in one of these factors. This acts as the stimulus for the reflex response. This stimulus triggers an...

An electrical impulse arrives at the synaptic knob in the pre-synaptic neuron. This causes the voltage-gated calcium ion channels to open and calcium ions will diffuse into the synaptic knob, down the con...