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Registered Dietitian

Category - Nutrition Care

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Basal metabolic rate (BMR) decreases by 20% between the ages of 40 and 90 years as a result of:

Decreased serum creatinine
Decrease in lean body mass (LBM) and increase in body fat
Decreased bone mineralization
Decreased pituitary gland secretion

Explanation

Answer: B - Basal metabolic rate (BMR) decreases by 20% between the ages of 40 and 90 years as a result of decrease in lean body mass (LBM) and a simultaneous increase in body fat. Creatinine is a measure of muscle mass but does not directly affect BMR.

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