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Quick And Long Energy

Quick And Long Energy






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    Quick And Long Energy Quick And Long Energy Presentation Transcript

    • Quick and Long Energy Chapter 7
      • Cells cannot get enough oxygen
      • Build up of pyruvic acid and NADH and no oxygen to break it down
      • Cells begin fermentation
        • Lactic Acid fermentation
          • Pyruvic acid + NADH  lactic acid + NAD+
          • Get about 90 seconds of energy without having to use oxygen
          • HOWEVER, oxygen will be paid back double when you are done (think heavy breathing)
          • Occurs in muscle cells, and microorganisms, such as the ones that turn milk into cheese and yogurt
          • Lactic acid causes muscle cramping and burning sensation
          • Oxygen is required to break down lactic acid and get it out of body
        • Alcohol fermentation
          • Pyruvic acid + NADH  ethyl alcohol + NAD+
          • Occurs in yeast cells and other microorganisms, such as the ones involved in the production of bread and wine
    • Quick Energy
      • 3 ways to obtain energy
        • ATP stored in muscles (glycogen) (short)
        • ATP from lactic acid (short)
        • ATP from cellular respiration (long)
      • Cells initially have small amount of ATP from cell resp. and glycolysis
      • Think of running a 200 m sprint
        • Gun goes off
          • Muscles of runner contract, turning glycogen in muscle cells into glucose, but this only provides for a few seconds of intense activity
        • You pass the 50m mark
          • most ATP the was initially stored is now gone
          • Muscle cells are producing ATP from lactic acid fermentation
          • This lasts about 90 seconds
        • End of Race
          • Lots of lactic acid build up
          • Only way to get rid of lactic acid is a chemical pathway that requires oxygen
          • Thus, at the end of the race, you are breathing heavily and you should follow an intense work out with a slow jog
    • Long Term
      • Energy for running long races or other endurance sports
      • Cellular respiration is the only way to get enough ATP to last the length of the race
      • Cellular respiration makes ATP more slowly than lactic acid fermentation
      • Athletes must pace themselves
      • Glycogen an important molecule
        • Carbohydrate
        • Polysaccharide (monosaccharide is glucose)
        • Muscle and liver cells store E as glycogen
        • Glycogen is broken down by the hormone Glucagon
        • Glycogen break down is also stimulated by muscle contraction
          • When you work out, muscles contract and they can use energy stored in glycogen
        • Increase glycogen storage, increase the duration of exhaustive work your muscles can do
        • Stores of glycogen last about 15-20 minutes
      • After glycogen is used up, body starts to break down other molecules to get energy
        • Fats and proteins
        • Fatty acids are broken down and carried to mitochondrial matrix and enter the membrane in fragments as acetyl-CoA
        • Proteins are broken down into aa and the these modified aa’s are fed back into the Krebs cycle (NAD+ and FAD)
      • Aerobic exercise is good for weight control because it leads to break down of fats
    • Training to Improve Function of ATP production
      • Anaerobic training
        • Increase levels of glycogen in muscle cells and increase tolerance of lactic acid build up
      • Aerobic training
        • Increases size and number of mitochondria in muscle cells and increase delivery of oxygen to muscle cells by improving heart and lung efficiency