MICROBIO 160 Lecture Notes - Lecture 9: Passive Smoking, Ionizing Radiation, Junk Food

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MICROBIO 160 Full Course Notes
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MICROBIO 160 Full Course Notes
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The role of genes & environmental in cancer development. And 90-95% of cancer have environmental causes. Just because you have the genetic code for cancer, does not mean you are born with it or will necessary get it. Poor diet, lack of physical activity, or being overweight. Chances of developing colon cancer is a relative risk of 58x between ages 60-79. Chances of developing lung cancer is a relative risk of 165x. Many people die with prostate cancer, not necessarily from it. Leukemia is only 4x because both elderly and children get it. *these types of radiation are dangerous because they penetrate. The longer the wavelength, the less energy there is. through the skin. Areas that are constantly hot have a greater risk (esp. of skin cancer) because there is more exposure. Different cancers have different prevalence in different parts of the world. Environmental more important than heredity in causing cancer.

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