KINE 1020 Lecture Notes - Lecture 22: Oxidative Phosphorylation, Phosphagen, Endergonic Reaction

• School: York University
• Department: Kinesiology & Health Science
• Course: KINE 1020
• Professor: Heather Edgell

Document Summary

Energy metabolism & bioenergetics: nutrients from ingested foods are provided and stored as; carbohydrates, fats and proteins. These 3 fuels, substrates , can be broken down in cells to release stored energy. Chemical pathways in cells, convert substrates to energy bioenergetics: all of the chemical reactions in the body are referred to as metabolism. Bioenergetics - flow of energy in a biological system resulting in the ability to do work, heat etc. Thermodynamics energy neither created or destroyed types of thermal (heat), chemical, mechanical, electrical, radiant and atomic/nuclear i. ii. Exergonic reactions - energy-releasing reactions (free energy - negativerg) Endergonic reactions - energy-consuming reactions (free energy positiverg) Metabolic pathway metabolism: total of all the catabolic/exergonic and anabolic/endergonic reactions in a system, regulated by mass-action and/or allosteric enzymes. Catabolic - breakdown of larger molecules into smaller molecules: anabolic - synthesis of larger molecules from smaller molecules. Atp is the metabolic currency in biological tissues.