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Iph 2403: Environmental Pollution And Toxicology Question Paper

Iph 2403: Environmental Pollution And Toxicology

Course:Bachelor Of Science In Public Health

Institution: Jomo Kenyatta University Of Agriculture And Technology question papers

Exam Year:2012

JOMO KENYATTA UNIVERSITY
OF AGRICULTURE AND TECHNOLOGY

University Examinations 2012/2013

YEAR IVSEMESTER I EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN PUBLIC HEALTH

IPH 2403: ENVIRONMENTAL POLLUTION AND TOXICOLOGY

DATE: AUGUST 2012 TIME: 2 HOURS

INSTRUCTIONS: ANSWER QUESTION ONE (COMPULSORY) AND ANY OTHER TWO QUESTIONS

1. a) Describe the sources of the following toxic metals and their effects to
the environment.

i) Mercury (3 marks)

ii) Lead (3 marks)

b) i) Explain the most common form of organic chemical pollution to water.(3 marks)

ii) Explain how the above chemicals get access to the water bodies. (3 marks)

c) Water pollution by foam may be serious. Explain. (3 marks)

d) Differentiate the following terms as used in Environmental Toxicology.

i) Biomagnification (3 marks)

ii) Bioaccumulation (3 marks)

e) Explain “Selective Toxicity” (3 marks)

f) Explain any three basic types of damage caused by toxic materials
in an environment. (3 marks)

g) Describe any three forms of indoor pollution. (3 marks)

2. a) Discuss the following air pollutants.

i) Carbon monoxide (Co) (5 marks)

ii) Sulphur Oxides (So2) (5 marks)

b) Describe the various sources of aquifer contamination with respect to
toxicology of water. (10 marks)

3. a) Discuss sources of indoor pollution and their ill health effects. (10 marks)

b) Describe the four main categories of exposure types of a toxic agent to
an individual population providing their duration periods. (8 marks)

c) Explain the exposure routes of any toxic agent to an individual. (2 marks)

4. a) Discuss the mechanism for minimizing toxic effects on an individual or
population. (10 marks)

b) Describe the following major sources of air pollution and their pathological
effects of humans.

i) Emission from vehicles (5 marks)

ii) Rapid industrialization (5 marks)

Iph 2403: Environmental Pollution And Toxicology Question Paper

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