UMass Amherst KIN 470 - 1:28:14 kin 470 class notes (6 pages)

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1:28:14 kin 470 class notes



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1:28:14 kin 470 class notes

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Pages:
6
School:
University of Massachusetts Amherst
Course:
Kin 470 - Exercise Physiology

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1 28 14 kin 270 class notes Energy and reactions o Finished off with this o Energy liberating exergonic o Energy consuming Take energy to happen endergonic The breakdown of glucose o Exergonic reaction o Take glucose molecule breaking that down o Lots of steps o Extract energy o Little bit left in glucose molecule o Metabolized the whole thing to carbon dioxide and water Coupled reaction o Exergonic reaction going from reactions to products o Coupled to adjacent gear o Product from reactants Exergonic reactions o Occur spontaneously o Put ATP into water left on desktop break down into ADP and phosphate o Occurs spontaneously Oxidation reduction electron transfer a coupled reaction o Transfer of an electron o Release of energy o Gain of energy o Oxidation offer Loss of electrons Molecule donates electrons to another molecule Not free e often with H Oxygen not required unlike the name implies Oxygen is a really strong acceptor of electrons o Reduction receive Gain of electrons Molecule accepts electrons typically with a H Oxidation and reduction reactions are couples o Compound A has 2 electrons with it Reducing agent o Meets with oxidized compound B o Electrons transfer from A to B o In process A is oxidized losing electrons o B is reduced gaining electrons o Terms can be confusing o At the end of the reaction oxidized compound o Opposite true of B o Gained electrons reduced compound A Key Electron Carrier o Nicotinamide Adenine Dinucleotide vit B3 o Lot of reactions this serves as electron carrier Reduced compound NAD serves as oxidizing agent Compound becomes oxidized NAD becomes reduced o NAD H is a shuttle to next compound Y Y gains electrons and protons NAD becomes reduced again o Recycling o Can do process all over again Enzymes o Catalysts that regulate the speed of reactions o Reactions would happen very slowly without them o Muscle contraction can happen in ms o Lower the activation energy required o Factors the regulate enzyme activity Temperature Optimum



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