Describe how a healthy kidney produces urine. (5 marks)
In this question you must first look at the wording. This is a describe question and therefore a description is required but not an explanation. It is worth 5 marks so aim to describe 5 or more reasons how a healthy kidney produces urine.
Through use of a diagram (I would draw a diagram of kidney nephron), you can see how the kidney is adapted to produce urine. The most important function of a kidney is to filter blood (1 mark), the blood is filtered by the kidney so that glucose is reabsorbed to be used for energy supply (1 mark). Some ions (1 mark) and some water (1 mark) are also reabsorbed back into the blood. Urea which is a toxic substance is removed by the kidneys and excreted in urine (1 mark).
HG
Related Biology GCSE answers
All answers ▸Describe how ions, water and sugar are obtained and transported through plants. In your answer you should refer to materials moving upwards and downwards in a plant. (6 marks)
A company plan to produce GM mosquitoes which carry a gene that causes the death of offspring before reaching adulthood. Male mosquitoes do n't feed on blood, so scientists are planning on releasing millions of GM males. Do you think they should?
Explain the role of plant hormones in plant shoot and root growth
Describe and explain how the structure of the small intestine is adapted for absorbing the products of digestion.