13. Excretion in humans
A section of Biology, 0610
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The liver is an important organ in many processes. The liver responds to changes in insulin concentration. Insulin is a hormone. Define the term hormone. Describe how the liver responds to an increase in insulin concentration. The liver is also involved in the processing of amino acids. Describe how excess amino acids are broken down. State the name of the process that assembles amino acids to form proteins. The liver is also involved in the processing of toxins. Lactic acid is an example of a toxin that is produced during vigorous exercise and processed in the liver. Describe how lactic acid is processed. Alcohol is another toxin that is processed in the liver. The effect of alcohol consumption on the risk of dying from liver disease was investigated in men and women. The results are shown in . men women alcohol consumption / g per day risk of dying from liver disease / arbitrary units Key: Describe the results shown in .
0610_w18_qp_41
THEORY
2018
Paper 4, Variant 1
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