BIO SCI 9A Lecture Notes - Lecture 9: Malnutrition, Alkalosis, Melanin
7 Sep 2016
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Document Summary
Nonessential amino acids: also known as dispensable amino acids. Conditionally essential amino acids: phenylalanine -> tyrosine (non-essential, i. e. pku (phenylkenonuria) Peptide bond linked aa chains: dipeptides 2 aa"s bonded together, tripeptides 3 aa"s bonded together, polypeptides more than 10 aa"s bonded together. Amino acid sequences are all different: protein shapes, protein functions. Protein denaturation the uncoiling of protein (change in shape) that changes its ability to function: by: heat, agitation, acid, base, alcohol, heavy metals. Hemoglobin in red blood cells hold iron molecule: positively charges iron attracts negatively charges oxygen. Nitrogen balance: studies synthesis, degradation, and excretion. Protein can be used for energy is needed; its excesses are stored as fat. Regulation of fluid balance: edema (excessive fluid) Inadequate intake of protein: composition of bodily fluids. Source of energy: 4 kcal per gram. Nitrogen balance: positive nitrogen balance retaining more n than excreting, nitrogen equilibrium, negative nitrogen balance losing more n than taking in.
