NTDT200 Chapter Notes - Chapter 7: Weight Loss, Bradycardia, Ketosis
6 Sep 2016
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Forms of energy: heat, mechanical, electrical, chemical (stored in food & body) Metabolism - release of energy, water, and carbon dioxide. Energy metabolism how body obtains and uses energy from food. Type and extent of metabolic activities depend on type of cell: liver cells are most versatile and metabolically active, *typical cell figure 7-1. Anabolism building up of body compounds: requires energy, ex. condensation. Catabolism breaking down of body compounds: releases energy, ex. hydrolysis. Atp (adenosine triphosphate) high-energy compound of adenosine + 3 phosphate groups: released during breakdown of glucose, fatty acids, & amino acids, rrovides energy for all cell activities. Body converts energy in food to atp with 50% efficiency (remaining 50% released as heat) Coenzymes complex organic molecules but not proteins; helpers of enzymes: without coenzyme, enzyme cannot function, b vitamins. Pathways of pyruvate: anaerobic (no oxygen required) for quick energy needs (i. e. sprints) Pyruvate accepts excess h from electron transport chain becomes lactate.
