Module 10 - Energy balance Flashcards
(30 cards)
How do you measure the BMR in humans?
Equations (DDP project)
Direct or Indirect Calorimetry (calorimetry must be done fasting because BMR is at rest)
How does Direct Calorimetry worl
metabolic chamber measures how much heat someones body is producing
How does indirect calorimetry work
measuring oxygen intake and CO2 output and using an equation
Breakdown the total energy expenditure
10 % Thermic effect of food;
30-50% Physical Act.;
50-65 % Basal Metabolism
proteins have a higher or lower thermic effect?
higher
How is BMR Affected?
Age, Lean Body Weight and Total Weight, Surface Area, Gender, Thyroxin, stress (injury),
extreme surrounding temperature swings, fasting, rate of growth
how many calories does a newborn need
110kcal/kg
what hormone triggers hunger
galin
What does BMI measure
It is measurement of weight/height ratio to give an ESTIMATE of body fat
what are the three ways to assess body weight/fat
Ideal body weight for height formulas;
Body composition (fat vs lean tissue)
Body fat location (lower is healthy)
why are things like BMI and “ideal” height/weight not always the best for assessing health isk
it does not measure the weight location or body composition and DOESN’T MEASURE BODY FAT
BMI = ____
Kilograms/Meters squared
Are the risks associated with certain BMI’s consistent with all people
no, varies some with ethnic group and gender
A patient has a BMI less than 18.5
underweight
BMI for healthy weight
18.5-24.9
BMI for Overwight
25-29.9
BMI for obesity
30-39.9
BMI for extreme obesity
greater than or equal to 40
what is morbidity?
risk of disease
What is considered lean mass?
Bone, Cartilage, Muscle
How much water do fat and muscle carry?
Fat is 13% water.
Muscle is 70% water
What are calipers?
Pinch fat in different places to measure subcutaneous fat
Bioelectrical impedence
A test that measures fat by measuring the time it takes to conduct electricity. Susceptible to over hydration or dehydration
Hydrostatic weighing
Measuring underwater
