CSEC Human and Social Biology · January 2018 · Paper 2

34 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)(i)2 marksDefine the term 'balanced diet'.
2. 1(a)(ii)2 marksState TWO nutrients, other than water, that must be included in the diet for it to be balanced.
3. 1(b)1 markWater can be used as a solvent. State ONE other function of water.
4. 1(c)1 markConstipation often occurs as a result of an insufficient intake of water in one's diet. Name ONE other important component of the diet that is necessary to prevent constipation.
5. 1(d)(i)3 marksCalculate the body mass index (BMI) of EACH male and state the category to which EACH individual belongs. Complete Table 1 and show working.
6. 1(d)(ii)1 markWhich of the four males would be MOST at risk for developing cardiovascular diseases?
7. 1(d)(iii)1 markWhich male, though not obese, would be considered unhealthy?
8. 1(e)(i)2 marksSuggest TWO reasons why more boys than girls were obese.
9. 1(e)(ii)2 marksSuggest TWO reasons why as the boys and girls aged, a greater percentage of women than men showed extreme obesity.
10. 2(a)(i)2 marksDefine the term 'vital capacity'.
11. 2(a)(ii)1 markName the instrument used to measure vital capacity.
12. 2(b)3 marksList THREE factors which increase the rate and depth of breathing.
13. 2(c)(i)4 marksExplain the difference between a depressant and a stimulant, and give ONE example of EACH.
14. 2(c)(ii)2 marksExplain the difference between physical and psychological dependence on drugs.
15. 2(c)(iii)3 marksSuggest THREE reasons why young people may start taking drugs.
16. 3(a)(i)1 markIdentify the structure labelled A.
17. 3(a)(ii)1 markIdentify the structure labelled C.
18. 3(a)(iii)1 markIdentify the structure labelled G.
19. 3(b)(i)1 markWhich letter represents the structure that converts light energy to nerve impulses?
20. 3(b)(ii)1 markWhich letter represents the structure that refracts light and helps the eyeball keep its shape?
21. 3(b)(iii)1 markWhich letter represents the structure that supports the lens?
22. 3(c)(i)3 marksName the condition Nigel has developed and state the cause of the condition.
23. 3(c)(ii)1 markWhat type of lens should be used to correct the problem?
24. 3(d)2 marksNigel's wife was diagnosed with hypertension five years ago and has vision problems. Suggest a possible eye disease that she may have developed and how it may be treated.
25. 3(e)3 marksLee's best friend says that our eyes really see things upside down. State whether Lee's friend is telling the truth and explain your response.
26. 4(a)(i)3 marksList THREE aspects of antenatal care that the doctor should monitor during a woman's pregnancy.
27. 4(a)(ii)3 marksState THREE reasons why mothers should breastfeed their babies.
28. 4(b)(i)6 marksAdvise EACH woman on her BEST option for contraception, giving an explanation for EACH option.
29. 4(b)(ii)3 marksVernon and Phyllis have a casual sexual relationship and use condoms. Suggest TWO benefits and ONE limitation of using condoms.
30. 5(a)6 marksList THREE other diseases that are associated with obesity, and THREE steps one can take to treat obesity.
31. 5(b)(i)4 marksCindy was diagnosed with Type II diabetes mellitus. Explain TWO differences between Type I and Type II diabetes.
32. 5(b)(ii)5 marksOutline FIVE effects of uncontrolled diabetes.
33. 6(a)6 marksDescribe how a sample of water is tested for bacteria in a school laboratory, and state TWO ways in which the floodwater could be purified at home.
34. 6(b)9 marksDiscuss the disposal of garbage from collection at your school to its arrival at the landfill, including an explanation of the operations at the landfill.