Occupational and Environmental Health: Recognizing and Preventing Disease and Injury - Multiple Choice Questions - Learn & Prevent

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Prepare for the Occupational and Environmental Health exam with our multiple-choice questions designed to help you recognize and prevent disease and injury. Study effectively and gain confidence for your upcoming test!

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What does the term 'biological half-life' refer to?

  1. The lifespan of a living organism

  2. The time it takes for a living organism to mature

  3. The time it takes for half of a chemical dose to be eliminated from the body

  4. The period during which a chemical remains active in the environment

The correct answer is: The time it takes for half of a chemical dose to be eliminated from the body

The term 'biological half-life' refers to the amount of time it takes for half of a chemical dose to be eliminated from the body. This concept is related to the process of metabolism and elimination of substances from the body. The other options are incorrect because they do not accurately reflect the meaning of biological half-life. Option A, the lifespan of a living organism, is too broad and does not specifically pertain to the elimination of chemicals. Option B, the time it takes for a living organism to mature, is also inaccurate as it does not involve the body's processing of chemicals. Option D, the period during which a chemical remains active in the environment, is closer in meaning to the half-life of a chemical in the environment, not the biological half-life. Therefore, option C is the correct answer.

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