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What is a synapse and how is information transmitted across it?

Synapse = the junction between two neurones (nerve cells) OR the junction between a neuron and an effector cell such as a muscle cell A synapse between two neurones consists of: a presynaptic neuron a post s...
EL
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A child is standing on a walkway that is moving at 2 metres per second and decides to turn around and walk back to the start at 2 metres per second. Explain why the child cannot reach the start of the walkway at this speed.

Assuming that the walkway is moving in a positive direction, the child is walking in the opposite direction to it and is therefore walking in the negative direction. Both the child and the walkway have veloc...
MS
Answered by Merry S. • Physics tutor
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Find the maximum point of the curve from its given equation: [...]

Firstly you would have to differentiate the equation to find the expression that describes the rate of change of the parameters relative to each other using the standard differentiation method. This involves...
MS
Answered by Merry S. • Maths tutor
3926 Views

How do I divide fractions?

If you have a fraction divided by another fractions things can get tricky, but there is an easy way to avoid getting triple decker fractions! Have a look at this example: (1/2) / (2/5) = (1/2) x (5/2) = (5/4...
MR
Answered by Molly R. • Maths tutor
3609 Views

What are the differences between the structure and function of arteries and veins?

Arteries are blood vessels that carry blood away from the heart . They have thicker walls than veins in order to cope with far higher blood pressure levels. Arteries also have a thicker layer of smooth muscl...
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Answered by William H. • Biology tutor
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