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Describe the process by which an action potential is propagated across a cholinergic synapse

A cholinergic synapse is one which uses acetycholine (ACh) as it's neurotransmitter. When the action potential reaches the synaptic knob at the presynaptic cell it leads to voltage gated Ca 2+ channels in th...
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Answered by David M. • Biology tutor
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How should I structure a history essay?

A history essay should contain an introduction, around three sections containing your argument, and a conclusion. The introduction should be brief and should set out a basic answer to the question, and indic...
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Answered by Flora C. • History tutor
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FP2 (old specification) - How do you find the derivative of arsinhx?

y = arsinhx We can rearrange this to be 2) sinhy = x, which makes this challenge slightly easier as we know that the derivative of sinhx is coshx and vice versa.Knowing the above we get coshy(dy/dx) = 1, we ...
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Answered by Lois M. • Maths tutor
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Discuss some of the challenges faced by urban areas in the UK as a result of urban change?

The challenges facing urban areas in the UK can broadly be categorised into two types, socio-economic and environmental challenges. The socio-economic challenges are those which impact the people in the area...
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Answered by Amie R. • Geography tutor
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The epithelial cells in the lungs are arranged into alveoli. Explain how the alveoli create a surface for efficient gaseous exchange.

Alveoli are made of two main types of cells. The alveoli walls are made of a single layer of squamous alveolar cells (aka Type I cells ), which are flat and thin, further shortening the diffusion distance. A...
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Answered by Yasamin M. • Biology tutor
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