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So Bacteria and other pathogens are too large to enter a cell via diffusion across the cells membrane so instead white blood cells will engulf them. This is essentially what phagocytosis is and cells that...
A motor neuron stimulates the sarcoplasmic reticulum, causing it to release Calcium ions. The calcium ions binds to the toponin that is blocking the myosin binding site on the acting filament, the binding...
Alleles are different versions of the same gene, which give different characteristics (or phenotypes) when expressed. Each gene has a pair of two alleles, and these pairs can be h...
The light-dependent reaction is the first stage of photosynthesis (the second stage is the light-independent reaction), and it takes place within the thylakoid membrane of the chloroplasts. Firstly, light...
Action potential arrives down the first neurone. The action potential is a changing potential as a result of ion channels opening along the walls of the neurone, with Na+ moving in down the electrochemica...
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