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How does the heart pump blood around the body?

Firstly it is very important to understand the basic anatomy of the heart, so I would ensure all students would be able to visulise and draw the structure of the heart and are capable of labelling the pathwa...
EM
Answered by Emma M. • Biology tutor
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What are the different roles of synapses in the nervous system?

When discussing synapses we tend to think of a typical cholinergic (uses an acetylcholine neurotransmitter) synapse, which transmits an action potential from the synaptic bulb of the presynaptic neurone to t...
ID
Answered by Isabelle D. • Biology tutor
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Find the equation of the tangent to the curve y = (5x+4)/(3x-8) at the point (2, -7).

Firstly, we need to find the gradient at this point on the curve as the tangent will have the same gradient. So to find the gradient of the curve or in other words, dy/dx, we differentiate the equation. To d...
MS
Answered by Manika S. • Maths tutor
4256 Views

A ball is fired from a cannon at 20m/s at an angle of 56degrees to the horizontal. Calculate the horizontal distance the ball travels as well as its maximum height reached.

This is a typical mechanics question in an AS/A-level exam and uses the principles of SUVAT and projection. We can try to calculate the maximum height reached first using the veritical components. SUVAT: s=?...
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Answered by Aaron F. • Maths tutor
6295 Views

How do you deal with 3 simultaneous equations? (Struggling with Q7 of AQA specimen paper 1)

If you need to solve them, then you just plug your way through the algebra to get to the answer. In this question (Q7) you need to find the value of a constant such that there is no solution to the three equ...
JW
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