Question

chapter 4 review — body weight & composition
multiple choice (6 questions)

1. body composition refers to:

a. a person’s height and weight only
b. the ratio of fat, bone, and muscle in the body
c. a person’s calorie intake
d. a person’s metabolism rate

1. why is bmi considered more accurate than height - weight tables?

a. it measures bone density
b. it measures muscle mass
c. it accounts for weight relative to height

Explanation:

Question 1

• Option A: Height and weight alone don't define body composition; they relate to BMI or general measurements, not the composition of fat, bone, muscle, etc.
• Option B: Body composition is the proportion of fat, bone, muscle, and other tissues in the body, so this matches the definition.
• Option C: Calorie intake is about energy consumption, not body composition.
• Option D: Metabolism rate is about energy use by the body, not body composition.

• Option A: BMI does not measure bone density (bone density is measured by other methods like DEXA scans).
• Option B: BMI does not measure muscle mass (it's a simple weight - height ratio and can misclassify muscular individuals as overweight).
• Option C: BMI is calculated as weight (in kg) divided by height (in meters) squared ($BMI=\frac{weight(kg)}{height(m)^2}$), so it accounts for weight relative to height, which is more accurate than height - weight tables that may not properly account for the relationship between the two.

Answer:

B. The ratio of fat, bone, and muscle in the body

Question 2