Chapter 7 ENERGY METABOLISM BODY TEMPERATURE §1. Energy meta bolism o Introduction definition Substantial metabolism Assimilation metabolism Dissimilation meta bolism(cata bolism) Energy meta bolism
Chapter 7 ENERGY METABOLISM & BODY TEMPERATURE § 1. Energy metabolism • Introduction & definition Substantial metabolism Assimilation metabolism Dissimilation metabolism (catabolism) Energy metabolism
Energy sources utilization k Energy sources of living organisms Direct donator of energy: ATP Reserve form of energy: CP Energy sources: food Glucose(I mol): aerobic glycolysis yields 38 mol ATP; anaerobic glycolysis yields 2 mol ATP Fat: 1 mol 6C fatty acid yield 44 mol ATP Protein; rarely used as energy donator
• Energy sources & utilization * Energy sources of living organisms Direct donator of energy: ATP Reserve form of energy: CP Energy sources: food Glucose (1 mol): aerobic glycolysis yields 38 mol ATP; anaerobic glycolysis yields 2 mol ATP Fat: 1 mol 6C fatty acid yield 44 mol ATP Protein: rarely used as energy donator
k Energy transfer utilization More than 50%o transfer to heat Less than 50%o store in the atp CP Utilization: synthesis growth never conduction muscular contraction glandular secretion active absorption etc
* Energy transfer & utilization More than 50% transfer to heat, Less than 50% store in the ATP & CP Utilization: synthesis & growth never conduction muscular contraction glandular secretion active absorption etc
食物中的能量(100%) 生 释 未利用的能量 (5%) 自由能(95%) 散发热量 化学能(45%) (50%) 移P ADP ATP 存 C-P Energ Source. 能 利完成机体各种功能活动 同时散发热量 reserve, 合成代谢 (20%~45%) 用 神经传导 transfer 肌内收纟 做外功的热量 其他 (0~25%) utilization
Energy source, reserve, transfer & utilization
e Measuring the metabolic rate k Direct calorimetry x Indirect calorimetry Principle: The law of constant proportions Several related concepts Thermal equivalent of food Thermal equivalent of oxygen Respiratory quotient(rQ) Classical simple measurement O2 consumption co2 production measuring Closed opened measurement
• Measuring the metabolic rate * Direct calorimetry * Indirect calorimetry Principle: The law of constant proportions Several related concepts Thermal equivalent of food Thermal equivalent of oxygen Respiratory quotient (RQ) Classical & simple measurement O2 consumption & CO2 production measuring Closed & opened measurement