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Bioenvironmental Engineering Apprentice (BEA) Block 12 Practice Test

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Blood Agents disrupt the oxygen-carrying properties of the blood.
Correct Answer:
Blood Agents
Explanation:
Blood agents act by stopping cells from using oxygen. They inhibit enzymes in mitochondria that cells need to extract energy from oxygen, so even though oxygen is carried in the blood, tissues can’t utilize it. This rapid cellular hypoxia matches the idea of disrupting the blood’s oxygen-using function, which is why this type of agent is classified as a blood agent. Other agent types affect different targets—airway irritation and lung injury (choking), nerve signaling (nerve agents), or skin and eye damage (blister agents)—so they don’t specifically describe disrupting how the blood oxygen is used by cells.

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