Chapter 7 ENERGY METABOLI SM BODY TEMPERATURE §l.Energy metabolism Introduction definition Substantial metabolism Assimilation metabolism Dissimilation metabolism (catabolism) Energy metabolism
Chapter 7 ENERGY METABOLISM & BODY TEMPERATURE § 1. Energy metabolism • Introduction & definition Substantial metabolism Assimilation metabolism Dissimilation metabolism (catabolism) Energy metabolism
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
• 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
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
* 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%) 氧 释 一未利用的能量 056】 放 自由能(95%) 散发热量 化学能(45%) (50%) 转移储存 Pi ADP+ ATP C-P c Energy 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%) 传导 肌肉收缩 酰外沙的势量 transfer 其他 utilization
Energy source, reserve, transfer & utilization
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
• 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