EESA10H3 Lecture Notes - Lecture 5: Bioavailability, Methyl Group, Reduced Form
10 Jun 2019
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So they are present naturally in earths crust: metals extracted from ore is used and incorporated in some products and those products have a finished service life and after some time it has to be disposed. Some can be melted and reused but not all. They will finish in a landfill or never back in original form, only in a form of a mineral. This is very dangerous because once you remove it from the ore, they can be very widely dispersed. Remember the examples in each class: receptors have functional groups and those groups attract whatever they are carrying and there is interaction between them. If something blocks that receptor so that protein can no longer do its function: ex- in bones, there is a lot of calcium. Metals can switch the form: resistance is more common in plants, some plants have resistance to lead.
