EHS 385 Lecture Notes - Lecture 5: Pyruvic Acid, Digestion, Adenylate Kinase
18 Dec 2017
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Document Summary
Food sources are processed via catabolism- the process of breaking down . Energy is transferred from food sources to our cells to be stored as adenosine triphosphate (atp) Adenosine triphosphate (atp): consists of adenine, ribose, 3 linked phosphates. Synthesis: from adenosine diphosphate (adp) and inorganic phosphate (pi) Formation of atp: phosphocreatine (pc) breakdown, degradation of glucose and glycogen (glycolysis, oxidative formation of atp. Anaerobic pathways: do not involve o2, pc breakdown and glycolysis. Aerobic pathways: require o2, krebs cycle, electron transport chain, beta oxidation. System can prevent energy depletion by quickly reforming atp from adp and pi. Limited quantity of atp and pc stored in muscle: fast energy source, stored at site of contraction. Does not require long series of chemical reactions to release energy. 1 mole atp is produced per 1 mole pc: primary energy source in short term (3-15 sec) all out event (100 m sprint) Creatine may be phosphorylated back to pc.
