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The fluidity of membranes allows it to invaginate and form vesicles. This is important for the process of endocytosis by which the cell is able to uptake materials from the extracellular environment. Vesi...

This is an example of a common process that must be known: Impulse reaches the synaptic bulb, causing calcium channels to open and calcium to enter. This causes synaptic vesicles to move towards the pre-s...

Mitosis is a part of the cell cycle in which the cell divides into two. There are a number of important steps in the process of mitosis including: anaphase, metaphase, prophase and telophase. Before mitos...

Venous blood enters the heart through the vena cava, it drains into the right atrium. The blood then flows through the tricuspid valve into the right ventricle. When the heart contracts the blood is eject...

The pancreas is the main organ involved with controlling blood glucose levels. It is situated in the abdomen just below the stomach. It consists of alpha and beta cells w...