exam 3
Consuming a beverage containing electrolytes 1 hour prior to a scheduled body composition assessment has what effect on BIA measurements?
%BF is increased
The two-component model of body composition assessment assumes a fat-free body density of
1.10 g·cc-1
Although body fat standards vary slightly with age and activity level, which of the following ranges best represents a recommended healthy body fat percentage for adult women?
20% to 28%
A waist-to-height ratio of _____ indicates an increased health risk for both men and women of various ethnic groups.
>0.50
The Bod Pod relies on
Boyle's Law
Which of the following is not true of dual-energy X-ray absorptiometry?
It is the preferred method for estimating total body water.
When assessing body composition using an A-mode ultrasound device, which of the following is true?
Meticulous identification of traditional skinfold sites is important.
Which of the following is least likely to result in a measurement error when using the bioelectrical impedance method to monitor changes in body composition over a period of 6 months?
a different technician for the pre- and postmeasurements
Total body water can best be estimated from which method?
bioelectrical impedance analysis (BIA)
Which of the following methods of body composition assessment is not considered a reference method?
bioelectrical impedance analysis (BIA)
Body density is defined as
body mass / body volume
What is measured by the underwater weighing and air displacement plethysmography procedures?
body volume
true or false: A BMI of 30 is equivalent to 30% body fat.
false
true or false: The larger the fat-free mass, the greater the resistance to the electrical current from BIA.
false
true or false: The recommended procedure for skinfold measurements is to let go of the fold once the jaws of the caliper are placed on the skin.
false
true or false: The taller the client, the greater the impedance to the flow of an electrical current through the body.
false
The traditional two-component model of body composition separates the body into which two components?
fat and fat-free
Which method of body composition assessment is likely to be the most difficult for the client to perform?
hydrostatic weighing
Body mass index is reported in which of the following units of measure?
kg/m2
Most skinfold prediction equations provide an estimate of
subcutaneous fat mass
Which measurements or estimations are necessary for the calculation of body volume using the air displacement plethysmography method?
thoracic gas volume and body surface area
true or false: Air displacement plethysmography is considered a densitometry method of body composition assessment.
true
Estimating body fat percentage from hydrodensitometry is an example of what model of body composition assessment?
two-component
Which of the following variables is not likely to affect the underwater weighing procedure?
whether or not the client uses a nose clip during the procedure
