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1) enzymes are biological catalysts that will speed up reactions by reducing activation energy for the reaction. 2) Lock and key theory concerns how the enzyme (lock) only forms a reactive complex with...

There are 3 key stages in filtration through the Kidney:

1. Firstly, blood is pushed through a tubular structure called the glomerulus - imagine a bowl of noodle...

At rest the membrane potential is -70mV.

This is due to the  Na⁺/K⁺ pump, which actively transports 3 Na⁺ ions out of th...

Enzymes are proteins that catalyse specific biological reactions in the body. These proteins have a specific 3D structure known as a teritary structure, with a specialised domain known as an 'active site'...

A nerve impulse travelling down a motor neurone causes the release of acetylcholine from the synpatic knob into the synaptic cleft. This then diffuses across the synaptic cleft down its concentration grad...