生理学双语ppt课件 第七章 能量代谢与体温.ppt

Chapter 7;;* 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.;;? 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;;;Indirect calorimetry;? Factors affecting energy metabolism Exercises Concept of oxygen debt Nervous Thinking peacefully anxious Food specific dynamic effect Environmental temperature Others: age, sex, circadian rhythm, hormones, diseases, etc.;? Basal metabolism Basal metabolic Rate (BMR) * Definition Law of body surface area * Under what condition BMR can be measured? In the Early morning Arousal condition Lie down peacefully with no exercises No nervous Have a good sleep last night Fasting for over 12 h Room temperature at 20~25 ℃;* Measurement NPRQ=0.82; NPTEO=20.18 kJ/L; BMR=20.18 kJ/L?Vo2/(m2·h) or MV: measuring volume; SV: standard volume * Physiological variation clinical significances Physiological variation: age, sex, metabolic level Clinical significances: assistant to diagnosis of some diseases, especially for thyroid dysfunction;Clinical significance of BMR;§ 2. Body temperature its regulation ? Normal temperature (about 37℃) * Core shell temperature * Definition of body temperature in physiology * Measurement