Questions: Question 13 The three components of total energy expenditure include? A. Basal metabolic rate, physical activity, and adaptive thermogenesis B. Basal metabolic rate, physical activity, and the thermic effect of food C. Basal metabolic rate, the thermic effect of food, and adaptive thermogenesis D. Basal metabolic rate, physical activity, and sleep activity

The answer is B: Basal metabolic rate, physical activity, and the thermic effect of food.

Explanation for each option:

A. Basal metabolic rate, physical activity, and adaptive thermogenesis - This option is incorrect because adaptive thermogenesis is not typically considered one of the three main components of total energy expenditure. Adaptive thermogenesis refers to the body's ability to regulate heat production in response to environmental changes, which is a more specific and less consistent component.

B. Basal metabolic rate, physical activity, and the thermic effect of food - This option is correct. The three main components of total energy expenditure are:

• Basal Metabolic Rate (BMR): The energy expended to maintain basic physiological functions at rest.
• Physical Activity: The energy expended during any form of physical movement.
• Thermic Effect of Food (TEF): The energy required for digestion, absorption, and metabolism of nutrients.

C. Basal metabolic rate, the thermic effect of food, and adaptive thermogenesis - This option is incorrect because it replaces physical activity with adaptive thermogenesis, which is not one of the primary components of total energy expenditure.

D. Basal metabolic rate, physical activity, and sleep activity - This option is incorrect because sleep activity is not a distinct component of total energy expenditure. While energy is expended during sleep, it is generally considered part of the basal metabolic rate.

In summary, the three components of total energy expenditure are basal metabolic rate, physical activity, and the thermic effect of food.