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

Once an action potential reaches the synaptic cleft of a pre-synaptic neuron, voltage-gated calcium channels open. It is the depolarisation of the membrane that causes the opening. Calcium ions subsequently ...
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Answered by Basel E. • Biology tutor
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How is a corrie formed?

A corrie is an armchair shaped depression on a mountain slope left by a cirque glacier. These are the steps leading to its formation: 1) Snow collects in a hollow on a mountain slope (normally the north faci...
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Answered by Jennie S. • Geography tutor
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How do you describe graph translations on x and y?

On the y-axis: if the graph is moved vertically up by 'n', its affecting the y value by a positive amount, so your (x,y) becomes (x,y+n) and your equation becomes y+n=f(x) rather than y=f(x), or equally beco...
GH
Answered by Georgina H. • Maths tutor
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Why is the nuclear model better than the plum pudding model of the atom?

The plum pudding model was the idea of a positively charged sphere, with negative electrons dotted within it as the model of an atom. easiest understood drawn out A scientist named Rutherford did an experime...
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Answered by Georgina H. • Physics tutor
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What is the difference between and alkane and and alkene?

Alkane's are formed from carbon and hydrogen atoms, a compound known as a hydrocarbon , in single bonds. Alkenes are also hydrocarbons, but contain a double bond. In both compounds, Carbon must always bond t...
GH
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