Heh403:Environmental Toxicology Question Paper

Heh403:Environmental Toxicology

Course:Bachelor Of Science In Environmental Health

Institution: Kenyatta University question papers

Exam Year:2008

KENYATTA UNIVERSITY
UNIVERSITY EXAMINATIONS 2007/2008
INSTITUTE OF OPEN LEARNING
EXAMINATIONS FOR THE DEGREE OF BACHELOR OF SCIENCE(ENVIRONMENTAL HEALTH)
HEH403:ENVIRONMENTAL TOXICOLOGY

DATE:Monday 7th January,2008 TIME;3.3OPM-5.30PM

INSTRUCTIONS:ANSWER ALL QUESTIONS IN SECTION A

Q1.Explain what Environmental Toxicology means (3mks)

Q2.Distinguish using examples between organic and inorganic toxins (3mks)

Q3.Explain the importance of dose-response relationship (3mks)

Q4.Differentiate between antagonism and potentiation as used in toxicology (3mks)

Q5.Distinguish between passive and active transfer of poisons within the body (3mks)

SECTION B
INSTRUCTIONS:IN THIS SECTION,ANSWER QUESTION ONE AND ANY OTHER TWO

Q1.(a)Explain the health effects associated with carbon dioxide (6mks)
(b)Outline and briefly explain the various types of interactions with toxic substances (6mks)
(c)Discuss the roles played by orfila and parcelsus in the development of Toxicology (8mks)

Q2.Write an essay on the factors influencing toxicity to a substance (15mks)

Q3.Discuss how toxins are distributed within the body (15mks)

Q4.Write down short notes on the effects of Lead,Mercury and Arsenic as heavy metals (15mks)

Q5.Discuss the adverse health effects associated with pesticides and herbicides (15mks)

END.

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