Question

1. Which component of the fat-free mass has the greatest density?

a.) Water

b.) Protein

c.) Mineral

2. Which of the following is NOT measured during a DXA whole body scan?

a.) Bone density in regions of the body (e.g., arms, legs)

b.) Total body fat

c.) Total body water

d.) Body fat in regions of the body (e.g., arms, legs)

e.) Total bone mineral content

3. The density of the fat-free mass may be affected by which of the following?

a.) Growth

b.) Ethnicity

c.) All the the choices listed.

d.) Two of the choices listed

e.) Aging

Answer 1

1.

The fat-free mass has the greatest density water.

Answer a.) Water

There is almost 74% of the water in the fat-free mass.

2.

Which of the following is NOT measured during a DXA whole-body scan?

Answer - e.) Total bone mineral content

DEXA Scan uses low-intensity X-ray beams to measure fat and wat composition, Bone mineral density, and Visceral fats. Total bone mineral content can not be measured by DEXA Scan.

3.

The density of the fat-free mass may be affected by growth, Ethnicity, and Aging. Example - Water level decreases with increased age.

Answer - c.) All the choices listed.