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An action potential from the presynaptic neurone arrives at the presynaptic knob. This process causes voltage-gated Calcium ion channels in the presynaptic membrane to open. Calcium ions then diffuse into...

It is important to remember that, though you may have a written record or transcript, you must not approach it as a written text. If you are analysing spoken language it is crucial to show the examiner or...

Integrating the equations: x² + 4x + 3 dx. To integrate, the method is to look each parts of the equation, e.g. the x² firstly. We would add 1 to the power to get x³ . The...

High absorption of salt from the diet results in a higher than normal concentration of salt (sodium chloride) in the blood plasma entering capillaries. This means that there is a higher concentration of s...

An unseen poem is designed to test your ability to respond to a poem, rather than memorising analysis, and your knowledge and application of literary terms. Though it can seem daunting, it is possible to ...