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What happens to the diaphragm during inspiration?

Diaphragm contracts which causes it to move downwards/become flatter
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Answered by Will H. • Biology tutor
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Name 2 products formed by burning fossil fuels which cause harm to the environment.

Carbon dioxide causes global warming which consequently leads to enhanced melting of polar ice caps and rising sea levels. Carbon particles lead to formation of smog which blocks out sunlight and causes dimm...
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Answered by Sophie C. • Chemistry tutor
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How do Calcium and ATP contribute to muscle contraction?

When the nerve impulse arrives, it stimualtes the opening of Voltage Gated Calcium channels in the sarcoplasmic reticulum. This means Calcium is released into the sarcoplasm where is can bind to troponin and...
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Answered by Sophie C. • Biology tutor
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integrate x^2 + 3x + 4

For the x 2 term we add one to the power, and then divide by 3 to get x 3 /3 For the next term we add one to the power and divide by the new power to get 3x 2 /2 We do the same for the 4, which just goes to ...
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Answered by Harry B. • Maths tutor
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Evaluate x^2 +2x -4 = 0

Using the quadratic formula (-b +- sqrt(b^2 -4ac))/2a we can sub substitute a = 1, b=2 and c = -4 to solve. The answer is x = -1 +/- sqrt(5)
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Answered by Adeolu C. • Maths tutor
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