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Explain the process that occurs in neuromuscular junctions from when the action potential in the pre-synaptic knob to transmission in the next neurone (6 marks).

  1. The action potential in the pre-synaptic neurone causes calcium ion channels to open

  2. This causes calcium ions to diffuse into the neurone, down its concentration gradient

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HE
Answered by Holly E. Biology tutor
2847 Views

Can firms in a perfectly competitive market make supernormal profits?

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...

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How am I meant to analyse an unseen poem when I can't even work out what the poem is about?

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...

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Describe the process of osmosis

Osmosis is the movement of water molecules from a high partial pressure (or concentration) to a low partial pressure (or concentration) down pa...

AF
Answered by Alisha F. Biology tutor
3580 Views

What is the final presentation for, and what am I expected to present in it?

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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