Chapter 3 (Section A) Flashcards
The process of converting ingested nutrients into energy in the body
metabolism
usable power derived from nutrient sources
energy
The symmetry between nutrient consumption and the energy demands of the body
energy balance
The energy released as the bonds that hold chemicals together are broken
chemical energy
Energy requirements for bodily functions such as digestion, respiration, and circulation are met by what two things
the presence of o2 and the digestion and absorption of nutrients
Six basic forms of energy:
chemical, nuclear, electrical, mechanical, thermal and radiant
What two aspects of energy production are required to perform cellular processes?
nutrients and o2
Amount of energy needed to raise the temperature of 1 gram of water by 1 degree (C) at a pressure of 1 atmosphere
calorie/kilocalorie
Alcohol calories per gram
7
Calories in a gram of stored fat from a carbohydrate source
3.27
How energy balance is measured
total calorie intake in a 24 hour period as compared to total energy expenditure in the same amount of time
Calories consumed by the average American
3600
Recommended calorie consumption (female/male)
1600-2400, 2000-3000
a tool to measure heat production and energy expenditure
caloriemeter
uses an insulated chamber to measure heat added to the ambient environment
direct calorimetry
measures o2 consumed and co2 produced
indirect calorimetry
Energy expenditure is the result of the cumulation of which four main processes in the body?
resting metabolic rate, thermic effect of food, physical activity, and physical growth
energy expenditure of metabolic and physical processes when the body is at rest
resting metabolic rate
energy expenditure associated with food consumption
thermic effect of food
RMR is also referred to as what?
Basil metabolic rate
Resting metabolic rate is the energy required to support which five functions?
support cardiac function and respiration, repair internal organs, maintain body temperature, and balance water and ions concentrations across cell membranes
a formula that can closely estimate the overall caloric need for an individual
Harris Benedict formula
the thermic effect of macronutrient digestion and absorption
diet induced thermogenesis
which macronutrient has the least effect on thermogenesis
fat