CSEC Human and Social Biology · January 2016 · Paper 2

32 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 marksIdentify structure B shown in Figure 1 and state its function.
2. 1(a)(ii)2 marksLabel A indicates a cavity. State TWO factors required for tooth decay to occur.
3. 1(a)(iii)2 marksState TWO measures, other than altering diet, that reduce cavity formation.
4. 1(b)(i)1 markIdentify the age group that is most severely affected by AIDS.
5. 1(b)(ii)1 markBased on Figure 2, determine whether the male or female population has more individuals suffering from AIDS in the 45–69 age bracket.
6. 1(b)(iii)3 marksPredict THREE aspects of the socioeconomic future for the population depicted in Figure 2.
7. 1(c)4 marksExplain TWO factors that have contributed to the decline in both the incidence and mortality rates of infectious diseases since 1900.
8. 2(a)3 marksComplete Table 1 by classifying each named vitamin (B1, C, D) as water soluble or fat soluble.
9. 2(b)(i)2 marksName TWO chemical elements found in protein molecules other than hydrogen and oxygen.
10. 2(b)(ii)1 markState ONE function of protein in the human body.
11. 2(c)(i)1 markIdentify the sugar most likely to be present in Cameron's bloodstream after digesting this meal.
12. 2(c)(ii)2 marksExplain why a slice of avocado is considered a better source of fatty acids than Cameron's slice of pizza.
13. 2(c)(iii)3 marksIdentify TWO structures present on the walls of the small intestine and suggest how they facilitate maximum nutrient absorption.
14. 2(c)(iv)3 marksState the process by which nutrients are absorbed across the intestinal wall and provide an explanation of this process.
15. 3(a)2 marksState TWO physiological activities regulated by the hypothalamus in the brain.
16. 3(b)4 marksComplete Table 2 by providing the missing information regarding the secretion triggers and actions of glucagon and insulin.
17. 3(c)(i)3 marksIdentify the pituitary hormone that is no longer secreted and suggest TWO physiological effects this will cause in Vonrick's body.
18. 3(c)(ii)4 marksIdentify TWO other hormones that will no longer be produced due to the non-functional pituitary gland, and describe the function of each.
19. 3(c)(iii)2 marksOutline TWO differences between the endocrine system and the nervous system.
20. 4(a)(i)3 marksState the function of each of the parts labelled A, B, and C in Figure 3.
21. 4(a)(ii)2 marksExplain what occurs within the eye that leads to the development of glaucoma.
22. 4(b)(i)3 marksIdentify the regions or components labelled A, B, and C in Figure 4.
23. 4(b)(ii)4 marksExplain the mechanism of a knee jerk spinal reflex.
24. 4(c)3 marksDetermine whether Sheena's action is voluntary or involuntary, and explain the key differences between voluntary and involuntary actions.
25. 5(a)(i)3 marksName TWO drugs used as medicines and ONE drug taken as an escape from reality.
26. 5(a)(ii)3 marksDescribe THREE social consequences resulting from the continued abuse or misuse of drugs.
27. 5(b)(i)6 marksDiscuss how smoking contributes to the development of lung cancer and stroke.
28. 5(b)(ii)3 marksSuggest THREE reasons explaining why cigarette smoking has become prevalent among teenagers.
29. 6(a)(i)3 marksIdentify the processes occurring at locations A, B, and C in Figure 5.
30. 6(a)(ii)3 marksDefine the term 'pollutant' and identify TWO ways in which human activities contaminate the water cycle.
31. 6(b)(i)6 marksDiscuss TWO effects of contaminated water on human health and the environment.
32. 6(b)(ii)3 marksSuggest THREE measures humans can take to reduce air pollution.