Tuesday, September 4, 2012

9/4/12

1. Carbohydrates
    a. Monosaccharides
    b. Oligosaccharides- short chains of monosaccharides
           -Sucrose: Glucose and Fructose molecules join and break off OH from glucose and H from fructose which = water (the bond forms and water breaks off)
           -This reaction is called dehydration synthesis (condensation): When and OH and and H group are removed from 2 monomers and this forms a polymer  
           -Hydrolysis: The chemical destruction of water in order to break chemical bons between the subunit of a polymer to form monomers. OH goes to 1 monomer, H gos to the other- when sucrose separates into glucose and fructose the H2O bond breads. (Also known as digestion, the reason you shouldn't eat when dehydrated)
           -Lactose: Milk Sugar=Glucose and Galactose
    c. Polysaccarides: long branching chains of glucose
              i. Glycogen: "Mid-term muscle fuel"-stored in the muscle and liver, first source to replace blood sugar.  Easily made from:
             ii. Starch: way that plants store glucose
             iii.Chitin (Kytin): structural carbohydrate- forms the exoskeletons of arthropods(insects, etc.)
             iv.Cellulose: forms the cell walls of plants(wood). Humans cannot break these bonds and get nutrition from cellulose.

2. Lipids: Composed of C, H, and ), but with far fewer oxygens that carbs.  This makes them lightweight and able to "carry" more energy/mass.  Purpose: long-term energy
-Lipids have much less oxygen, known as hydrocarbons because they are mostly hydrogen and carbon
-Oxygen is heavier than Hydrogen, making lipids much lighter than carbs.

                

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