chapitre 2 Flashcards
defined calorie
energy needed to raise temperature of 1g of water 1ºC
calorie is which type of energy
heat energy
joule referez to what type of energy
mechanical
définie a joule
energy required to move a mass of 1g at a velocity of 1 m/s
_% of all E produced is for movement/work
remainaing _% is lost in _
20%, 80% in heat
condition for REE measurement
Resting in supine position >30 min before
¡ Fasting >12 h
¡ No exercised for >24-48 h
¡ No caffeine >4 h
¡ No nicotine >1 h
¡ No alcohol >48 h
¡ Darkened, quiet, thermoneutral environment
¡ Normal acid-base balance
frequently use method of estimating energy intake
- 24h recall
- food frequency questionnnaires
- food diary
Resting metabolism accounts for about ____% of a sedentary
person’s daily energy expenditure.
70
Thermic Effect of Food accounts for ~ ____ %.
10
Physical activity accounts for ~ _____ %.
20
which equation for calculate RMR is found to be the most accurate
mifflin
energy content of carbs
4
energy content of protein
4
energy content of fats
9
energy content of alcohol
7
Which of the chemical com-
pounds provides the direct source of energy for
force production by muscle cells?
creatine phosphate
Indirect calorimetry works on the prin-
ciple that:
energy expenditure can be predicted if respira-
tion and perspiration are carefully measured.
The “energy out” factor that can be in-
creased to the greatest degree is:
Thermic Effect of Food
Which of the following statements is NOT
true regarding intake when athletes are keeping a
food record?
a. Food intake is consciously reduced.
b. Food intake is unconsciously reduced.
c. Food intake is difficult to record due to fre-
quent snacking.
d. Food intake is underreported by females but
not by males.
b
T/f:T he body creates energy from the food that is consumed
False. The body cannot create energy. Through the process called bioenergetics, the body transforms the energy that is contained in food to forms that are usable in the body.
what is the scientific measure of energy
joule
T/F: Physical activity is responsible for the largest amount of energy expended during the day for the average adult in the United States.
False, resting metabolism make up for 70% and PA 30%
Research stud-
ies show, however, that ATP concentrations in exercis-
ing muscle rarely drop more than _ % and why
20-30%
after the ATP concentration in an exercis-
ing muscle is reduced to this degree, the force produc-
tion ability of the skeletal muscle is reduced, and the
muscle starts to fatigue.
T/F kilocalorie and Calories (with uppercase) is equivalent
true
This determination of energy expenditure by gas exchange is termed
indirect calorimeter
the thermal energy of the food is
directly measured, this process is referred to as
direct caloriemeter
The
primary influences on energy expenditure are
are resting
metabolism and physical activity in the form of activ-
ity, exercise, and sport.
