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Coronary heart disease is an incredibly common disease. It involves the coronary arteries: the arteries which provide oxygenated blood to the heart tissue itself to keep it functioning. Remember that most ar...

To answer this we can start by breaking down the phrase itself. So, 'myo' always means muscle. 'Cardial' means of the heart. So myocardial infarction means infarction of the heart muscle. So what is infarcti...

When a neurone is at rest, the outside of the neurone is more positive than the inside. This is due to the sodium-potassium pump which actively pumps 3 Na+ outside the cell, whilst at the same time pumping 2...

Enzymes are biological catalysts that are formed from globular proteins. Active site is the molecule surface space where the substrate binds and catalysis occurs. Extra points: - Enzymes are NOT used up in a...

Amylase (Salivary amylase) Source: salivary glands in the mouth Substrate: starch Products: maltose Optimum pH: 4.6-5.2 Protease (pepsin) Source: chief cells in the stomach Substrate: proteins, polypeptide c...