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14 Cards in this Set

  • Front
  • Back
Food Energy Flow Chart
Metabolism
Biochemical process of converting nutrients to energy and compounds used by the animal;
O2 + CH2O = energy and H2O (metabolic water)
energy interconversions example
Partitioning Energy
Evaluation of Energy in Foods
Gross, Fecal, and Urinary Energy
Determining Heat from a Compound
Why "Heat Increment"
Basal Metabolism/Fasting Heat Production
Heat produced from: Catabolism of body tissues, maintain body temperature, minimum body functions necessary for life.
Resting Metabolic Rate (RMR) - Animals
Conditions for Measurement
-Fasted: monogastric - overnight fast
ruminants - > 3 days
-Rested: minimum movement for animals
-thermal neutral zone
-methane production minimal
Basal Metabolic Rate (BMR)
Unit of Reference for Basal Metabolism: Metabolic Body Weight
-heat loss not related to body weight, but to SA
-metabolic body weight (MBW)=BW kg^0.75
-maintenance (basal metabolism) energy calculated as:
Homeotherms: man, pigs, poultry, dogs, cats
Poikilotherms: marine-aquatic, worms, crustacea
Dairy Cow Energy Balances
Measuring ME: Direct/Indirect Calorimetry
1. Direct Calorimetry - direct measurement of head
2. indirect Calorimetry - based on biochemical principles and known combustion values.