NATS 1560 Lecture Notes - Lecture 4: Food Energy, Chemical Energy, Activation Energy
11 Dec 2017
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Document Summary
Our body disassembles the molecules of macronutrients into molecular building blocks (digestion) Molecular building blocks: monosaccharides, amino acids, fatty acids, and glycerol. It then uses the molecular building blocks to. Digestion - macronutrients can be broken down into monomers that are common to all proteins, lipids, carbs. Metabolism - all the physical and chemical processes occurring in the cells of a living organism; preferred fuel is glucose (fuel of central nervous system) Excretion - putting out waste; basically the stuff that is extra is excreted. Conservation of energy, or 1st law of thermodynamics: energy cannot be created or destroyed, it can only be transmitted or converted from one form to another. Chemical energy - energy stored in chemical bonds. Body can be understood as a machine. Body metabolism: flow of energy in, through, and out of the body. Heat is a form of energy - transferred from hot surface to a cold one.
