Metabolism of the whole organism Metabolic profiles of organs Metabolic conditions Blood glucose levels: 90 mg/dL Fuel reserves glucose triacylglycerols proteins
Metabolic homeostasis
Metabolic profiles
Brain Nervous system: maintain membrane potentials uses glucose (120g/day) 60% of all glucose blood levels of 84.7 = 1mM in brain starvation use ketone bodies Heart : uses fatty acids or ketone bodies
Muscle contraction store glycogen resting use fatty acid oxidation active use glucose starvation muscle broken down to alanine for gluconeogenesis
Adipose Tissue uses fatty acids for energy exports fatty acids glycerol exported out to the liver
Liver & Kidney Liver: provides fuel to other organs gluconeogenesis, maintain blood glucose store glycogen export ketone bodies uses keto acids for fuel Kidney: needs energy for active transport uses FA, KB, glucose, amino acids, gluneogenic tissue
Metabolic conditions Controlled by hormones insulin glucagon epinephrine Normal regulation of blood glucose Insulin secretion
Hormonal control
Hormones
Exercise fuels during different levels of exercise ATP production
Starvation/Fasting Fuel mobilization after 3 day changes long term shifts hormonal changes
Starvation profiles
Fuel Modifications
Liver modifications
Diabetes types of diabetes changes in fuels problems
Insulin deficiency