A specific class of chemicals, called blood agents, are of great concern to first responders. They are highly toxic to the human body because they:

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Multiple Choice

A specific class of chemicals, called blood agents, are of great concern to first responders. They are highly toxic to the human body because they:

Explanation:
Blood agents are chemical asphyxiants. They disrupt cellular respiration by inhibiting enzymes in the mitochondria (such as cytochrome oxidase), so cells can’t use oxygen even when it’s present in the blood. That rapid blockade of oxygen utilization causes quick, global hypoxia and severe toxicity. They aren’t acids that burn tissue, they aren’t inert, and exposure isn’t limited to ingestion—inhalation is a primary route.

Blood agents are chemical asphyxiants. They disrupt cellular respiration by inhibiting enzymes in the mitochondria (such as cytochrome oxidase), so cells can’t use oxygen even when it’s present in the blood. That rapid blockade of oxygen utilization causes quick, global hypoxia and severe toxicity. They aren’t acids that burn tissue, they aren’t inert, and exposure isn’t limited to ingestion—inhalation is a primary route.

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