Quiz Flashcards
BMR
energy needed to sustain the body in the postabsorptive state with no food intake for at least 12 hours prior and no exercise for at least several hours
RMR
body’s energy requirement during rest, typically only slightly higher than BMR and is measured in less rigid conditions
Body composition
determined by the percent of fat mass and fat-free mass
BMI
numerical value derived from an individual’s height and weight. kg/m
Ectomorph
person with body build marked predominantly of tissues from ectoderm; linear body with sparse muscular development
Endomorph
person with a body build marked by a predominance of tissue derived from the endoderm, round but average to above average lean muscle mass and higher body fat
Mesomorph
body build characterized by predominance of tissue derived from the mesoderm; higher lean muscle mass and lower to average body fat
Anoid body type
Apple shaped; manlike, more fat in the abdominals
Gynoid
Pear shaped; womanlike, more fat in thighs
Caloric Output
BMR plus caloric burn from physical activity
Caloric Input
Caloric intake during a day
Dietary induced thermogenesis
energy to digest, absorb, and assimilate nutrients and the stimulating effect of this process on metabolism, 10% of caloric output but is increased if there is a higher protein or alcohol intake and lower if there is a higher fat consumption
Fat mass
equals the total body mass multiplied by the percent of body fat
Hyperplasia
increase in the number of fat cells; occurs in the last trimester before birth, first year of life, and during adolescence
Hypertrophy
Increase in the size of fat cells
Lean body mass
total body mass minus fat mass
Obese
women: 40%
men: 30%
Overfat
Women: 30-39.9%
Men: 20-29.9%
Overweight
BMI >25
Set point theory
humans have a set point at which weight is held within a particular range
Densitometry
based upon the principle of tissue density; ratio of body mass to body volume. Muscle tissue is more dense and thus takes up more space than fat tissue; comparing body mass to body volume
Underwater Densitometry
considered the gold standard to assess body composition because it is based upon principles advanced by Archimedes; deals with displaced fluid
Air Densitometry (Plethysmography)
Converts the body density into percent body fat by assess the amount of air displaced
DEXA
Highly valid method to predict percent body fat, also measures total bone mineral
Fatfold/Skinfold Technique
Use of calipers to measure thickness of fatfold
Anthropometric Measurements
Circumference technique to assess body fat; likely overestimates body fat in muscled patients
Bioelectrical Impedance
small alternating current flowing between two electrodes passes more rapidly through those with hydrated fat free body tissue than those with greater fat content
Near Infrared Interactance
uses the technique of light absorption and reflection to estimate the chemical composition of the body
Self concept
Personal feelings about themselves and strengths/weaknesses and develop image of self from others opinions