PHYSEDU 203 Lecture Notes - Lecture 13: Superoxide Dismutase, Low-Density Lipoprotein, Manganese
1 Nov 2016
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Document Summary
The loss of electrons from a molecule: reduction. The gain of electrons by a molecule: oxidation and reduction. Exchange reaction: stable atoms contain an even number of paired electrons. An atom that has lost an electron and is left with an unpaired electron. Free radicals are highly reactive and can cause damage to: oxidative damage melecules in the cell. Oxidative stress is defined by an imbalance between oxidant production. Many metabolic processes involve oxidation reactions an can produce free radicals. Free radicals are also produced by: pollution, ultraviolet light and radiation, toxic substances. Free radicals cause damage to: cell membranes, low density lipoproteins (ldls, proteins in the cell, genetic material (dna) Diseases linked to free radicals: cancer, heart disease, diabetes, arthritis, cataracts. Antioxidants: antioxidants can function in different ways. Antioxidant food: carotenoids, vitamin c, vitamin e, some minerals (selenium) Vitamin e: vitamin e is a fat-soluble vitamin made of. Biologically active form: functions of vitamin e.
