Question 1

The percentage body fat can be expressed mathematically as&#10;A) fat weight &#247; lean body mass &#215; 100%&#10;B) fat weight &#247; total body weight &#215; 100%&#10;C) lean body mass &#247; fat weight &#215; 100%&#10;D) lean body mass &#247; total body weight &#215; 100%

Accepted Answer

The percentage of body fat is calculated by dividing the weight of the fat by the total body weight and then multiplying by 100%. This gives the percentage of the body weight that is made up of fat.

Question 2

Which of the following represents the fat that is necessary to maintain normal physiological function?&#10;A) Storage fat&#10;B) Subcutaneous fat&#10;C) Essential fat&#10;D) Abdominal fat

Accepted Answer

Essential fat is crucial for normal physiological functions, including hormone regulation, temperature regulation, and providing necessary fatty acids the body cannot produce on its own.

Question 3

Overweight that is determined by BMI is defined as&#10;A) Disproportionally greater weight for a given height&#10;B) Disproportionally greater body fat for a given weight&#10;C) Disproportionally greater height for a given weight&#10;D) Disproportionally greater weight for a given age

Accepted Answer

Overweight, as determined by Body Mass Index (BMI), is defined as having a disproportionately greater weight for a given height. BMI is a simple calculation using a person's height and weight.

Question 4

Which of the following are usually overweight but non-obese?&#10;A) Body builders&#10;B) Distance runners&#10;C) Elderly&#10;D) Basketball players

Accepted Answer

Bodybuilders often have a high muscle mass which increases their weight relative to their height, potentially classifying them as overweight by BMI standards despite having low body fat percentages.

Question 5

Body composition assessment that evaluates the resistance to electrical flow within the body is&#10;A) plethysmography&#10;B) near-infrared interactance&#10;C) bioelectrical impedance analysis&#10;D) dual-energy X-ray absorptiometry

Accepted Answer

Bioelectrical impedance analysis (BIA) measures the resistance of body tissues to the flow of a small electrical signal, which is used to estimate body composition, particularly body fat and muscle mass.

Question 6

Body density is equal to&#10;A) body mass &#247; height&#10;B) body mass &#247; body volume&#10;C) body mass &#247; body fat&#10;D) body volume &#247; body mass

Accepted Answer

Body density is calculated as body mass divided by body volume, which is the mass of an object (in this case, the human body) divided by the volume that the object occupies.

Question 7

Which of the following does not represent a limitation of using skinfolds to predict body fat?&#10;A) The person must be experienced taking the measurements&#10;B) For obese people the thickness of the fat fold often exceeds the caliper's jaws&#10;C) The particular caliper used (i.e., plastic vs. metal) may contribute to measurement error&#10;D) Results will be altered significantly if the person being tested is not properly hydrated

Accepted Answer

Skinfold measurement inaccuracies are generally not affected by the hydration status of the person being tested. The limitations mainly involve the skill of the person taking the measurements, the suitability of the calipers, and the physical limitations related to the size of the fat fold, not hydration.

Question 8

Which of the following formula is the Siri Equation used for converting body density to percentage body fat?&#10;A) 450 &#247; body density - 495&#10;B) 495 &#247; body density - 450&#10;C) 450 &#215; body density - 495&#10;D) 495 &#215; body density - 450

Accepted Answer

The Siri Equation for converting body density to percentage body fat is given by the formula: $ \frac{495}{\text{body density}} - 450 $. This formula is used in body composition studies to estimate the percentage of body fat based on the density of the body.

Deck 11: Nutrition and Metabolism in Special Cases