HUMAN PHYSIOLOGY Chapter 16 Energy Metabolism Body Temperature Ying-ying Chen,PhD Unvro bchenyy@zju.edu.cn
Ying-ying Chen, PhD Dept. of Physiology, Zhejiang University School of Medicine bchenyy ＠zju.edu.cn HUMAN PHYSIOLOGY HUMAN PHYSIOLOGY Chapter 16 Chapter 16 Energy Metabolism & Body Temperature
SECTION A ENERGY METABOLISM
SECTION A ENERGY METABOLISM
Energy Balance The difference between the number of kilocalories that you eat and the number of kilocalories that you burn Energy Balance
Energy Balance The difference between the number of kilocalories that you eat and the number of kilocalories that you burn
Energy intake Energy sources Fat->fatty acids Long carbohydrates->shorter->glucose Shorter carbohydrates('sugars')->glucose Proteins->Amino acids
Energy intake Energy sources \Fat -> fatty acids \Long carbohydrates -> shorter -> glucose \Shorter carbohydrates ('sugars') -> glucose \Proteins -> Amino acids
Glucose:a major energy source Aerobic oxidation C6H1206->38ATP+6C02+12H20 Glycolysis GLUCOSE C6H1206 2 ADP+2 Pi 2 ATP GLYCOLYSIS 2 Pyruvic Acid
Glucose: a major energy source \Aerobic oxidation \Glycolysis
Fat Major form of energy storage Alternative Energy Source
Fat \Major form of energy storage \Alternative Energy Source
Proteins
Proteins
Energy transfer ATP:primary energy currency Adenosine triphosphate,ATP phosp hate Adenine Ribose high energy hond
Energy transfer ATP: primary energy currency
Phosphocreatine:an ATP "buffer" Creatine ATP Creatine Oxidative Kinase Metabolism Phospho- ADP Creatine
Phosphocreatine: an ATP “buffer
Energy expenditure 50% ADP+P- Respiration ATP Biosynthesis Mechanical heat work 25% C02+H20 Heat is the end product of almost all the energy released in the body
Energy expenditure Heat is the end product of almost all the energy released in the body heat heat heat 50% 20% 25%