We Measure Toxicity by the Dose at Which Adverse Effects

question 2

Multiple Choice

We measure toxicity by the dose at which adverse effects are produced. Which of the following statements about the dose of and response to toxic agents are true?

• A)Lethal doses of particular toxicants for humans are known through doing laboratory tests on human subjects.
• B)Doses are expressed in milligrams of toxicant per kilogram of body weight.
• C)Sub-lethal doses usually produce acute toxicity whereas lethal doses produce chronic toxicity.
• D)Response to a dose depends only on the type of toxicant and not the age or health of the organism.

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Definitions:

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Cells in the body responsible for the production of melanin, a pigment that determines skin, hair, and eye color.

Dark-skinned

Describes individuals with a high melanin content in their skin, which gives it a darker appearance.

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A genocide during World War II in which Adolf Hitler's Nazi Germany, aided by its collaborators, systematically murdered approximately six million Jews, along with millions of others.

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Racial categories are classifications of humans into groups based on physical traits, ancestry, genetics, or social relations, often used in a sociopolitical context.