BIOLOGY IN HUMAN WELFARE
HUMAN HEALTH AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which statement best illustrates limitations to determining the toxicities of environmental chemicals?
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Humans are exposed to just one chemical; they are exposed to a mixture of chemicals that may produce synergistic effects.
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It is too expensive to test toxins that could be harmful to humans.
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The wide genetic variability of humans limits scientists’ ability to determine toxicity trends for environmental chemicals
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Recent legislation has limited the amount of animal testing that can take place.
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It is difficult to determine what types of chemicals humans are exposed to.
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Explanation:
Detailed explanation-1: -The toxicity of a substance depends on three factors: its chemical structure, the extent to which the substance is absorbed by the body, and the body’s ability to detoxify the substance (change it into less toxic substances) and eliminate it from the body.
Detailed explanation-2: -Metabolism, also known as biotransformation, is the conversion of a chemical from one form to another by a biological organism. Metabolism is a major factor in determining toxicity .
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