3. energy balance and body weight Flashcards
(38 cards)
can be defined as the quantity of work a particular system can
perform.
Energy
energy is classified as either?
potential - stored energy, energy waiting to happen
kinetic - is energy in motion
unit of measurement that defines
the energy contained in a energy
yielding nutrient
calorie
is the amount of energy in
the form of heat
calorie
is the amount of heat
generated by a particular macronutrient
kilocalorie
energy from macronutrients
carbs
protein
fat
alcohol
4
4
9
7
A nutrient’s metabolic path is
dependent upon
energy balance
In a positive energy balance the?
excess nutrient
energy will be stored or used to grow
In negative energy balance you?
aren’t taking in
enough energy to meet your needs, so your body
will need to use its stores to provide energy.
a standardized mathematical prediction
of a person’s daily energy needs in kilocalories per
day required to maintain weight.
estimating energy requirement
The sum of caloric expenditure
total energy expenditure
TEE is dependent on?
age, sex, height, weight, and physical activity level
refers to those metabolic
pathways necessary to support and maintain
the body’s basic functions while at rest
basal metabolism
is the amount
of energy required by the body to conduct its
basic functions over a certain time period.
basal metabolic rate
The great majority of energy expended daily is from conducting life’s basic
processes.
between 50 - 70%
BMR is dependent on
body size, age, sex, body composition, nutritional status and genetics
t or f: muscle tissue burns more calories than fat tissues while at rest
t
BMR of
liver
brain
heart
kidneys
skeletal muscle (at rest)
other organs
27
19
7
10
18
19
the amount of calories
burned by the human body in one day adjusted to
the amount of activity (sedentary, moderate or
strenous)
total energy expenditure
The energy required for all the
enzymatic reactions that take place
during food digestion and absorption
of nutrients
thermic effect on food
thermic effect on food accounts
10% of total energy expended per day
fat tissue produces what hormone that balance the positive energy in the body
leptin
what part of the brain senses if nutrient levels in the blood decreases, and when they are high the satiety center is stimulated
hypothalamus
factors affecting energy intake
hunger
satiety
fat tissue
genetic influence
psychological/behavioral influences
societal influences