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Explain the main thermoregulatory processes in humans.

Thermoregulation involves both trying to increase and decrease our body temperature in order to maintain a temperature of 37 degrees celsius. Four main processes exist- convection , conduction , radiation an...
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Answered by Harvey W. • Biology tutor
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List five (5) risk factors for coronary heart disease, and briefly outline a piece of evidence for each one (5)?

(Chapter: further human physiology) Factor + explanation (1 point for each) for coronary heart disease (CHD):-Genetics: CHD tends to run in some families-Age: CHD is a disease of old age-Gender: men are more...
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Answered by Dimitrios K. • Biology tutor
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The value of a car depreciates by 35% each year. At the end of 2007 it was £5460. Work out the value of the car at the end of 2006.

-This question wants us to work backwards.Let N be the value of the car in the year 2006. Find the multiplier . 1-0.35 = 0.65. Hence N * (0.65) = £5460. Rearrange for N. N = £8400
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Answered by Rithvik G. • Maths tutor
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The second and fifth terms of a geometric series are 750 and -6 respectively. Find: (1) the common ratio; (2) the first term of the series; (3) the sum to infinity of the series

x n = ar (n-1) (1) x 2 = 750 = ar 1 (2) x 5 = -6 = ar 4 divide second equation by first-6/750 = r 3 r 3 = -0.008r= -0.2Insert into first equation.750 = a * -0.2a = -3750Sum to infinite series = a(1/(1-r))(in...
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Answered by Henry P. • Maths tutor
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What is transcription?

Protein synthesis is the production of new proteins. This happens in two stages, transcription and translation Transcription - forming mRNA from DNA 1) The DNA section to be copied (gene) is unwound by helic...
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Answered by Rebecca H. • Biology tutor
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