EXCI 252 Ch 8 Sample Questions F2023

1 EXCI 252 Sample Questions for Chapter 8 1. Which of the following statements about the Bioelectrical Impedance Analysis (BIA) method is FALSE ? a) Technician skill is not a major source of error. b) A high ambient temperature results in an underestimation of % BF. c) A female’s menstrual cycle does not affect the results obtained with BIA. d) Resistance varies indirectly with skin temperature. 2. Which of the following responses is a source of error with skinfold (SKF) measurements ? a) Using different calipers when monitoring changes in SKF thicknesses b) Hydration level of the client c) A lack of intratechnician reliability d) All of the above 3. Which of the following measurements is NOT made during the Bod Pod testing procedure? a) Height measurement b) Body surface area measurement c) Weight measurement d) Thoracic gas volume measurement 4. What is the maximal volume of air that can be expired from the lungs after a maximal inspiration ? a) Total Lung Capacity (TLC) b) Functional Residual Capacity (FRC) c) Vital Capacity (VC) d) Residual Volume (RV) 5. Which of the following occurs if any air remains in the body during the administration of the underwater weighing procedure ? a) Buoyancy is decreased b) Body volume is decreased c) Body density is increased d) Underwater weight is decreased 6. Which of the following body composition assessment methods is a 3- component model ? a) Bioelectrical impedance analysis (BIA) b) Computed tomography (CT) c) Hydrostatic weighing (HW) d) Magnetic resonance imaging (MRI)

2 7. Which of the following responses is a disadvantage of using DEXA to assess body composition ? a) DEXA requires a significant amount of technician skill. b) DEXA cannot accommodate special populations. c) DEXA requires special clothing. d) DEXA requires significant client cooperation. 8. Which of the following is one of the pretest guidelines for Hydrostatic Weighing ? a) Bring a towel and wear shorts for the test. b) Do not consume gas-producing foods for at least 10 hours before the test. c) Do not engage in strenuous exercise for at least 6 hours before the test. d) Do not ingest gas-producing beverages for at least 12 hours before the test. 9. Which of the following responses is a limitation of the body mass index (BMI) ? a) The BMI can overestimate body fat in adults who have lost muscle mass. b) The BMI is not a good measure of visceral fat. c) The BMI underestimates body fat in adults who are very muscular. d) The BMI provides a low BMI for very short adults. 10. What is the percent body fat of a person with a body weight of 70.15 kg , a net underwater weight of 3.36 kg , a r esidual volume of 1100 mL , and an assumed gastrointestinal volume of 100 mL using the Siri (1961) percent body fat equation ? The density of the water in the underwater weighing tank was 0.9956511 g/cm 3 at a water temperature of 30 degrees Celsius . a) 14.87 % b) 15.52 % c) 13.56 % d) 14.98 % 11. Which of the following body composition assessment methods is based on Boyle’s Law ? a) Dual energy x-ray absorptiometry b) Air displacement plethysmography c) Hydrostatic weighing d) Skinfold measurements 12. Which of the following individuals will displace the greatest amount of water when underwater weighed during the hydrostatic weighing procedure ? a) A 150-pound woman with 15 % fat mass and 85 % fat-free mass. b) A 150-pound woman with 25 % fat mass and 75 % fat-free mass. c) A 150-pound woman with 20 % fat mass and 80 % fat-free mass. d) A 150-pound woman with 30 % fat mass and 70 % fat-free mass.