BLG 181 Lecture Notes - Lecture 11: Irritable Bowel Syndrome, Dietary Fiber, Galactose
Document Summary
Evolutionary connection all living organisms have same biochemistry, with same 4 types of macromolecules used as building blocks: nucleic acids, carbs, proteins, fats. Dna & rna are made up of nucleotides: each nucleotides has central sugar, a phosphate group and a nitrogenous base, recall mutations: genetic differences upon which natural selections can act. Remaining 3 macromolecules: carbs, proteins and lipids, fall into the category of nutrients. Energy dense: amount of energy (calories) in food/ unit weight. Nutrient rich: naturally abundant in vitamins, minerals and other nutrients. Sources: on average, young adults in na get energy dense food. veggie/ vegans eat more nutrient rich. Sucrose: table sugar. glucose + fructose lactose tolerance-intolerance: lactose: milk sugar, carb found in milk, enzyme lactase. Splits disaccharides lactose into glucose and galactose: without lactase: Adaptation: gives you benefit in an environment. If dairy is a regular source in a society, most likely. Dairy products: is it an adaptation: no.
