EESA10H3 Lecture Notes - Lecture 9: Lead Paint, Aspirin, Vitamin A
5 May 2019
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Document Summary
Common sources of lead exposure old pipes and soil. It is hard to evaluate the effect of chemical because people have different sensitivities. Determination of severity of adverse effects: the properties of the chemical: potency of the chemical, sensitivity to that particular chemical, how much enters the body length of exposure. Basic concept of toxicology: the dose makes the poison , developed nearly 400 years ago by a well-known physician known as paracelsus, toxicologists adopted this model, eg. If you take a fraction of a dose of aspirin, it isn"t going to really do a lot to your system. If you have a headache and take several aspirins, it will probably alleviate your headache. It commonly occurs in vegetables, fruits, and fish. It can be formed from beta-carotene an orange material that gives the orange color to squash and carrots. Vitamin a or retinol is essential but high doses cause central nervous system damage particularly in children.
