1
NTR 555 FINAL EXAM QUESTIONS AND
ANSWERS-2026 JUST
RELEASED ACTUAL VERSION
bioelectric impedance analysis - correct answer- BIA can be measured
look at total body water and BIA TBW= a *
(height)^2/ R + C
this is a proportional relationship
TBW from isotope dilution-- there is a standardized curve, and will give
statistical estimate
R--> TBW--> then infer fat mass
issues with BIA - correct answer- does NOT work for severely obese, since
inferences cannot be made from curve (extrapolation)
doesn't measure short term changes well
,2
have to be at same hydration, temperature- can't replicate well
how to measure muscle mass? - correct answer- CT scan, dual X-ray
absorptometry
MRI- % H2O
isotope dilution with K-40
--> potassium inside cell, water everyone, label K see how much in tissue vs
in cell
problems with see what weight lost- fat or muscle - correct answer- all of
these methods are using mode/ method based on correlation & population
data
find fat % + Standard error (always going to be 2- 3.5%, no matter how good
measurement was)
usually fat loss is going to be equal to SE- so can't tell if fat or lean mass lost!
how do we analyze body composition for kids? - correct answer- for
kids, look at growth curve, rather than body composition
growth chart, with mean and standard deviation HOWEVER,
this is based on 1980 population now 2/3 of kids are >85%,
need to change curve today increasing BMI
, 3
recommendations
stillRDA (EAR + standard deviation)
look at height and weight gain curve for ages
Ways to define fitness: cardiorespiratory/ aerobic endurance - correct
answer- ability to do moderately strenuous act over a period of time; how
well heart and lung work together
muscular endurance - correct answer- hold position/ repeat movement many
times
muscular strength - correct answer- max force @ one time; heaviest for one
time
flexibility - correct answer- ability to move joint through range of motion,
elasticity of muscle
ways to analyze health - correct answer- health history- questionnaire that
contains info about general, dietary, exercise, cardiorespiratory,
musculoskeletal, as well as prior disease
food intake: diet
NTR 555 FINAL EXAM QUESTIONS AND
ANSWERS-2026 JUST
RELEASED ACTUAL VERSION
bioelectric impedance analysis - correct answer- BIA can be measured
look at total body water and BIA TBW= a *
(height)^2/ R + C
this is a proportional relationship
TBW from isotope dilution-- there is a standardized curve, and will give
statistical estimate
R--> TBW--> then infer fat mass
issues with BIA - correct answer- does NOT work for severely obese, since
inferences cannot be made from curve (extrapolation)
doesn't measure short term changes well
,2
have to be at same hydration, temperature- can't replicate well
how to measure muscle mass? - correct answer- CT scan, dual X-ray
absorptometry
MRI- % H2O
isotope dilution with K-40
--> potassium inside cell, water everyone, label K see how much in tissue vs
in cell
problems with see what weight lost- fat or muscle - correct answer- all of
these methods are using mode/ method based on correlation & population
data
find fat % + Standard error (always going to be 2- 3.5%, no matter how good
measurement was)
usually fat loss is going to be equal to SE- so can't tell if fat or lean mass lost!
how do we analyze body composition for kids? - correct answer- for
kids, look at growth curve, rather than body composition
growth chart, with mean and standard deviation HOWEVER,
this is based on 1980 population now 2/3 of kids are >85%,
need to change curve today increasing BMI
, 3
recommendations
stillRDA (EAR + standard deviation)
look at height and weight gain curve for ages
Ways to define fitness: cardiorespiratory/ aerobic endurance - correct
answer- ability to do moderately strenuous act over a period of time; how
well heart and lung work together
muscular endurance - correct answer- hold position/ repeat movement many
times
muscular strength - correct answer- max force @ one time; heaviest for one
time
flexibility - correct answer- ability to move joint through range of motion,
elasticity of muscle
ways to analyze health - correct answer- health history- questionnaire that
contains info about general, dietary, exercise, cardiorespiratory,
musculoskeletal, as well as prior disease
food intake: diet
