energy balance - energy intake same with energy output
positive intake - weight gain
negative intake - weight lose
nutrient and energy
energy capacity to do work
food become energy
fat + carbo + protein
using kilocalories as their unit
estimate kcal
bomb calorimeter
burn food - inrease water temperature
nutrient estimate
car - 4
fat - 9
protein - 4
alcohol -7
macronutrient and storage
cho protein and fat when they are not use will store as fat
adult need more protein 4 repair and build tissue
basal metabolism - min energy expended keep body alive
60-70% need
maintain heartbeat and respiration
influence
age
gender
body temperature
pregnancy
thermic effect - energy use for absorb and digest
5-10% energy need
measurement body energy
direct calorimetry
measure heat produce
indirect calorimetry
measure 02 use
harris benedict equation - estimate resting need
influence
age
gender
height
weight
why do you eat
hunger
physiological drive to eat
control by internal body
apettite
physilogicak drive to eat
absence to hunger
safety regulator
hypothalamus
feeding cell stimulate to eat
satiety cell stimulate to stop eat
sympathetic nervous system
activity increase - stop eat
activity decrease - eat
hormone
endorfine
cck
serotonin
nutrient effect
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