Metabolism Lab Flashcards
body is basically a
biological consumption engine
car uses gas as
source of fuel
gasoline is injected into engine where
it is burned
pressure created by that burning fuel
propels the vehicle
what propels the body
digestive system
food is taken is as a source of
fuel
biological reactions then break down organic compounds in food to
create ATP which propel the body
when food is burned, biological energy is
converted to thermal energy (heat)
if you use thermal energy to heat a given volume of water, you can use the change in temperature to
calculate the energy of the food
a calorie is
unit of energy that measures how much energy food provides to the body
the body needs calories to
function properly
the amount of calorie in food gives you
energy, protein, carbohydrate, nutrients and fat to fuel your body
when you eat food your body turns the food into fuel burning it to produce
calories (energy)
the calories in your food come from
carbohydrates, proteins, fats
a gram of carbohydrate contains
4 calories
a gram of protein contaiins
4 calories
a gram of fat contains
9 calories (2x carbohyrdrates or proteins)
food with same serving size may have far more
calories
nutritionists do/do not recommend calorie counting for teens
do not unless doctor orders
normally refer to kilocalories as
calories
when you see calories on label it actually means
kilocalories (same as when refer to activity that burns calories)
1000 calories
1 kilcalorie
a calorie is the amount of energy or heat needed to
increase the temperature of one gram of water by one degree celcius
1 kilojoule has how many calories
239 calories
a unit of electrical energy it takes to equal the current of 1 ampere passed through a resistance of one ohm for one second
1 joule
1000 joules
kilojoule
one calorie equals how many kilojoules
4186 kilojoules
one pound of body weight
3500 calories
average man calories suggested per day
2900
average woman calories per day
2200
