CSEC Human and Social Biology · January 2014 · Paper 2

33 questions and parts from this paper. Open one to see it in full, then practise it on Quelpr and get it marked against the mark scheme.

1. 1(a)3 marksName the structures labelled A, B and C in Figure 1.
2. 1(b)(i)1 markChoose the correct term from the list provided in brackets (lifestyle, nutritional, respiratory, sexually transmitted) to complete the sentence: Asthma is described as a _______ disease.
3. 1(b)(ii)2 marksState TWO signs or symptoms of asthma.
4. 1(c)(i)3 marksOn the grid provided, draw a bar graph to represent the data in Table 1 (Location and Number of Asthma Cases).
5. 1(c)(ii)4 marksUse your knowledge of asthma triggers and the data in Table 1 to account for the number of asthma cases across the different locations.
6. 1(d)2 marksDescribe the trend shown in Figure 2.
7. 2(a)(i)2 marksName the structures labelled A and B in Figure 3.
8. 2(a)(ii)2 marksState ONE function of EACH of the structures labelled A and B.
9. 2(b)2 marksDuring blood clotting, fibrinogen is converted to fibrin. State which of these two proteins is soluble and which is insoluble.
10. 2(c)5 marksComplete the drawing of the artery in Figure 5 to show the effects of nicotine on the artery, and annotate your drawing to explain how nicotine affects the artery.
11. 2(d)4 marksAfter sitting on a stool for several hours, Robert notices his lower limbs feel very heavy, but walking around relieves this sensation. Explain the association of tissue fluid and lymph with Robert's symptoms.
12. 3(a)(i)2 marksName the parts labelled A and B in Figure 6.
13. 3(a)(ii)2 marksState ONE function of EACH of the parts labelled A and B.
14. 3(b)2 marksName ONE excretory organ other than the kidney, and identify the substance it excretes.
15. 3(c)(i)2 marksBased on the diagram in Figure 7, explain why a partially permeable membrane is needed in renal dialysis.
16. 3(c)(ii)2 marksExplain why the dialysis fluid must have approximately the same glucose concentration as the patient's blood.
17. 3(c)(iii)5 marksExplain how the hypothalamus would control the water content of the blood when blood solute concentration is high, assuming normal kidney function.
18. 4(a)(i)3 marksComplete the sentence: Sewage consists of _______ and _______, along with household _______.
19. 4(a)(ii)2 marksState TWO ways that remote communities could reduce the volume of household refuse produced.
20. 4(a)(iii)2 marksExplain why dumping household refuse on a vacant lot next to a playground threatens community health.
21. 4(a)(iv)2 marksName TWO diseases that may result from this improper disposal of household refuse.
22. 4(b)(i)1 markIdentify which component of a sewage treatment plant comes immediately before the activated sludge tank.
23. 4(b)(ii)5 marksCompare the functioning of the activated sludge and biological filter tanks, giving TWO similarities and THREE differences.
24. 5(a)(i)4 marksState TWO differences between sterilization and disinfection.
25. 5(a)(ii)4 marksSuggest how sterilization and disinfection could be used when caring for a baby, providing TWO situations for EACH method.
26. 5(b)(i)2 marksExplain what is meant by the term 'antibiotic'.
27. 5(b)(ii)5 marksExplain why the antibiotics are no longer effective for Shoba's recurring ear infections, and suggest measures she should take in the future to ensure antibiotic effectiveness.
28. 6(a)4 marksDistinguish between continuous and discontinuous variation, and give ONE example of EACH type.
29. 6(b)2 marksExplain how the chromosome number of an individual with Down's syndrome differs from that of a normal person.
30. 6(c)6 marksUse a Punnett square to determine the genotypes of the offspring from a cross between a female carrier of red-green colour blindness (X^R X^r) and a normal male (X^R Y^-), and state the phenotype of EACH offspring.
31. 6(d)(i)1 markSuggest the possible type of pollution resulting from cell phone towers erected close to residential homes.
32. 6(d)(ii)1 markSuggest a possible adverse effect of this pollution on humans.
33. 6(d)(iii)1 markSuggest an action humans could take to reduce the impact of this pollution.