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What is a carcinogen?
Definition: Carcinogen. A carcinogen is defined as something that can directly cause cancer. This can be a chemical substance, a virus, or even the medications and radiation we use to treat cancer.
What are the 3 types of carcinogens?
Carcinogen, any of a number of agents that can cause cancer in humans. They can be divided into three major categories: chemical carcinogens (including those from biological sources), physical carcinogens, and oncogenic (cancer-causing) viruses. Read More on This Topic. cancer: Cancer-causing agents.
Why are carcinogens tested for carcinogens?
Most carcinogens are tested because they once caused cancer in lab animals, as it can be assumed (for safety reasons), that any element causing disease in animals will most likely do the same for humans. These types of tests look at several groups of people to see if there is a link between cancer and other factors.
How do Environmental Carcinogens cause cancer?
Environmental carcinogens are physical, chemical and biological exogenous agents that cause cancer after having penetrated into the organism. Cancer is mostly a disease caused by chronic exposure to low dose carcinogens. Mutagenesis and tumor promotion are rate-limiting steps.