Excretion and Osmoregulation · CSEC Biology

23 past-paper questions on Excretion and Osmoregulation, part of Life Processes and Disease, from every CSEC Biology paper on Quelpr.

1. 1(b)(i)4 marks· Biology Q1 1(b)(i)Name the parts labelled I, II, III and IV in Figure 2.
2. 1(b)(ii)4 marks· Biology Q1 1(b)(ii)Describe how the structures named in (b)(i) help humans to regulate their body temperature.
3. 2(a)(ii)2 marks· Biology Q2 2(a)(ii)Identify from the diagram TWO structures which aid in temperature regulation in humans.
4. 2(a)(iii)2 marks· Biology Q2 2(a)(iii)State TWO functions of the skin other than temperature regulation.
5. 2(b)(i)4 marks· Biology Q2 2(b)(i)Mr Firebon was badly burnt and lost all of Region 1 shown in Figure 2 on page 6. Suggest TWO ways in which the functioning of the skin would be affected.
6. 3(a)2 marks· Biology Q3 3(a)Name TWO metabolic waste products excreted by plants.
7. 3(a)(i)6 marks· Biology Q3 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.
8. 3(a)(ii)1 mark· Biology Q3 3(a)(ii)Name the hormone secreted by the pituitary gland when there is NOT enough water in body cells.
9. 3(a)(iii)4 marks· Biology Q3 3(a)(iii)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.
10. 3(b)(i)2 marks· Biology Q3 3(b)(i)Explain why there is glucose in the urine of the diabetic person, assuming that the kidneys are functioning properly.
11. 3(b)(ii)2 marks· Biology Q3 3(b)(ii)Use arrows on the diagram in Figure 3 to show the pathway taken by urine on its way out of the male's body.
12. 4(a)(i)8 marks· Biology Q4 4(a)(i)With the aid of a fully annotated diagram of the kidney (uriniferous) tubule, explain how urine is produced and gets to the bladder.
13. 4(a)(ii)8 marks· Biology Q4 4(a)(ii)Suggest why urine production is important in humans.
14. 4(b)3 marks· Biology Q4 4(b)Explain how his body functions to deal with the excess water.
15. 5(a)2 marks· Biology Q5 5(a)Name TWO substances excreted by the kidney.
16. 5(b)9 marks· Biology Q5 5(b)With the aid of an annotated diagram, explain how urine is formed in the human kidney.
17. 5(c)4 marks· Biology Q5 5(c)An analysis of a sample of urine shows the presence of blood cells and glucose. Account for the presence of these substances in the urine.
18. 6(a)6 marks· Biology Q6 6(a)Describe how the human skin helps the body to keep cool on a hot, sunny day.
19. 6(c)4 marks· Biology Q6 6(c)how would a hormone secreted from your pituitary gland work to prevent you from becoming completely dehydrated?
20. 4(a)6 marks· CSEC Biology · May/June 2021 · Paper 2Use Figure 4 to describe how urine is formed.
21. 4(b)(i)4 marks· CSEC Biology · May/June 2021 · Paper 2Explain why there is a high concentration of glucose in the urine of a diabetic patient.
22. 4(b)(ii)3 marks· CSEC Biology · May/June 2021 · Paper 2State one similarity and two differences between the method by which the human body regulates blood sugar levels and the method by which it regulates the amount of water in the blood.
23. 4(c)2 marks· CSEC Biology · May/June 2021 · Paper 2Suggest two ways in which kidney damage can be prevented in diabetic and hypertensive patients.