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Respiration is the process which cells use to produce energy and happens in the mitochondria of the cells. Almost every cell carries out respiration. There are 4 main stages to respiration - glycolysis, t...

Action potentials are only initiated when depolarization above a certain level occurs, this level is known as the 'threshold potential'. 'Vm' is the resting membrane potential (voltage) and the depolarizi...

A virus is a pathogen which contains antigens on its cell surface. These antigens are detected and digested by macrophages. The two pathways involved in the detected and elimination of the virus is the ce...

The structure of plant and animal cells is generally similar since they are both eukaryotic cells. They contain many of the same organelles including but not limited to the nucleus, mitochondria and the e...

• "Explain" - so must give reasons why something is happening - Increased blood flow - what does this mean? Means more blood reaches the muscles -What does the blood carry (...