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4 marksExcretion and Osmoregulation

CSEC Biology · May/June 2014 · Paper 2 · Question 3(a)(iii)

Figure 7 is a diagram of a nephron found in a human kidney.

Explain why the composition of urine produced at X would differ in someone who drank a lot of water compared to someone who had no water to drink for over 24 hours.

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Other parts of this question

  1. 3(a)(i)Identify the structures labelled A, B and C in Figure 7 and briefly describe the process that takes place in EACH of these structures.[6 marks]
  2. 3(a)(ii)Name the hormone secreted by the pituitary gland when there is NOT enough water in body cells.[1 mark]
  3. 3(b)(i)Explain why there is glucose in the urine of the diabetic person, assuming that the kidneys are functioning properly.[2 marks]
  4. 3(b)(ii)Describe TWO ways of managing diabetes mellitus.[2 marks]

More practice: the rest of this paper · more Excretion and Osmoregulation questions · all CSEC Biology past papers