The basal metabolic rate slows with increasing age because:

Question

Quizplus · Accepted Answer

Lean body mass, which includes organs, muscles, and bones, requires more energy to function than fat mass. As people age, their lean body mass decreases while their fat mass increases, causing a decrease in basal metabolic rate. Therefore, choice letter D (lean body mass diminishes) is the correct answer. Lean body mass, which is responsible for the majority of the body's calorie burning, decreases with age, resulting in a slower basal metabolic rate.

The Basal Metabolic Rate Slows with Increasing Age Because