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The action potential in the pre-synaptic neurone causes calcium ion channels to open
This causes calcium ions to diffuse into the neurone, down its concentration gradient
Firms in a perfectly competitive market can make supernormal profits but only in the short run. Supernormal profit is made where average revenue exceeds average cost. In a perfectly competitive market, fi...
Firstly, don't forget that it's normal not to know what a poem is saying straight away! The whole idea of a poem is for a poet to put forward an idea or thought implicitly, using metaphor...
Osmosis is the movement of water molecules from a high partial pressure (or concentration) to a low partial pressure (or concentration) down a pa...
Your presentation is a chance for you to talk about your final product and show the examiner how you researched and came to a final conclusion about the question you have proposed. You will need to includ...
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