Multiple Choice:

Which of the following statements about basal metabolic rate (BMR) is false?

Question

Multiple Choice:

Which of the following statements about basal metabolic rate (BMR) is false?

BlackTom AI · Accepted Answer

To evaluate which statement about basal metabolic rate (BMR) is false, we examine each option in the context of how BMR relates to body composition and metabolism.
Option 1: 'The BMR decreases with increased lean body mass.' This is incorrect. In reality, BMR tends to rise with greater lean body mass (muscle, organs), because lean tissue is metabolically active and requires more energy at rest. Therefore, this statement misstates the fundamental relationship between lean mass and energy expenditure.
Option 2: 'The BMR decreases in older adults.' This is generally true. As people age, they typically lose lean mass and may experience hormonal changes that reduce metabolic rate, leading to lower BMR. So this statement aligns with common physiological patterns observed across adulthood.
Option 3: 'The BMR typically decreases on a weight loss diet.' This statement is also true in many cases. When calorie intake is restricted, the body may adapt by lowering metabolic rate somewhat to conserve energy; this adaptive thermogenesis can cause BMR to decrease during weight loss, though the extent varies among individuals.
Option 4: 'The BMR is the largest component of energy expenditure.' This is broadly accurate. At rest, BMR accounts for the majority of total daily energy expenditure, typically around 60–75% in many individuals, making it the largest single component of energy use.

In summary, option 1 is the outlier because it incorrectly asserts that increasing lean body mass would decrease BMR, which contradicts established physiological principles. The other statements reflect common, evidence-supported aspects of BMR and its determinants.

Multiple Choice: Which of the following statements about basal metabolic rate (BMR) is false?

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