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Describe the transmission of a nerve impulse across a synapse.

An action potential arrives at a presynaptic neurone, which causes calcium ion channels to open. Calcium ions enter the presynaptic knob, which causes synaptic vesicles containing neurotransmitter to detach ...
Answered by • Biology tutor
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What is the difference between the Via Positiva and the Via Negativa?

The Via Negative (also known as the apophatic way) is the idea that we can only state things about God by stating what he is not. Positive sentences about God such as "God is Good" cannot be valid ...
Answered by • Religious Studies tutor
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work out 64^2/3

solve 64 2/3 ... note X 2/3 = X 2 x 1/3 therefore 64 2/3 = (64 2 ) 1/3 = (4096) 1/3 = 16
PK
Answered by Patrick K. • Maths tutor
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Find the derivative of the function y = (2x + 12)/(1-x)

Using quotient rule, let u = 2x+12 and v = 1-x. Then we differentiate u and v separately, so u' = 2 and v' = -1. The formula for the quotient rule is: (vu' - uv')/v^2. Plugging in our values into this equati...
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Answered by Mahreen J. • Maths tutor
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(edexcel style A-level) To what extent was leadership the main reason for the failure of chartism during the years 1839 — 1849?

A failure or lack of cohesive and organised leadership of the Chartist movement during the years 1839 to 1849 has often been cited as one of the main reasons that Chartism failed. The movement was made up of...
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Answered by Nia G. • History tutor
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