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Explain how the hormone insulin controls blood glucose concentration

Insulin is a hormone secreted from the pancreas in response to high blood sugar levels (glucose). Insulin causes cells in the liver to convert glucose into glycogen (storage molecule) absorbing glucose out o...
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Answered by Shivam K. • Biology tutor
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Find the area contained under the curve y =3x^2 - x^3 between 0 and 3

Equation of curve is: y = y =3x 2 - x 3 To find area need to integrate between 0 and 3So integrating each term gives x 3 - x 4 /4 + cThen sub in the limits [(3 3 - 3 4 /4) - (0 3 - 0 4 /4)] = 27-81/4 = 27 - ...
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Answered by Juan R. • Maths tutor
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Compare and contrast the structures of fibrous and globular proteins.

The crucial thing with a "compare and contrast" question is that you have to give both similarities and differences to get full marks. Firstly, both of these proteins are chains of amino acids join...
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Answered by Oscar B. • Biology tutor
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Explain how the human body is adapted for gas exchange

Gas exchange occurs in the lungs where oxygen enters from the air and diffuses into the blood stream and carbon dioxide in moves the opposite direction. Oxygen is needed for respiration by the body, for exam...
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Answered by Louise A. • Biology tutor
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What happens to the arteries in coronary heart disease?

The blood vessels supplying the heart (coronary arteries) become narrowed or blocked. This is caused by plaque buildup in the artery walls. These plaques are made up of fatty deposits (cholesterol). Plaque b...
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Answered by Shivam K. • Biology tutor
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