Question 27 Could something liver like inflammation be an acute outcome for expo

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Question 27

Could something liver like inflammation be an acute outcome for exposure to some chemical and a chronic outcome the same chemical? What is the level of cancer risk that is usually considered "acceptable" by regulators? and where does that number come from? Define LD50. And, Is LD50 used in a chronic or acute context? For rats, the LD50 for THC, the active chemical in marijuana, is given as 1.27 g/kg. From the point of view of DEATH as the endpoint, is the highly toxic? Who was Percival Pott and what does he have to do with the history of the study of cancer? Section 3. Pesticides, Chlorinated Dioxins, Chlorinated Furans, PCBs, PBBs, and PBDEs Looking at a chemical structure, what two primary chemical characteristics are found in legacy insecticides?

Explanation / Answer

27.) LD50 : LD stands for "Lethal Dose". LD50 is the dose of radiation or drugs or pathogens required to kill 50%(one half) of a group of test animals usually within a certain time.

LD50 is used in acute context.It is one way to measure the short-term poisoning potential (acute toxicity) of a material.

The information on acute context systemic toxicity generated by the test is used in hazard identification and risk management in the context of production, handling, and use of chemicals.

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