Which of the following would typically represent the greatest calorie expenditure for an individual?

• A. EAT.
• B. NEAT.
• C. TEF.
• D. BMR.

Answer: (D)

Verified step by step guidance

1. Understand the terms: BMR (Basal Metabolic Rate), EAT (Exercise Activity Thermogenesis), NEAT (Non-Exercise Activity Thermogenesis), and TEF (Thermic Effect of Food). BMR refers to the energy expended by the body at rest to maintain basic physiological functions like breathing, circulation, and cell production.
2. Recognize that BMR typically accounts for the largest portion of total daily energy expenditure (TDEE), often around 60-70%, as it represents the energy required for essential bodily functions.
3. Compare the other components: EAT refers to calories burned during structured exercise, NEAT includes energy expended during daily activities like walking or fidgeting, and TEF is the energy used to digest, absorb, and metabolize food. These components generally contribute less to TDEE compared to BMR.
4. Consider the context of the question: Since BMR represents the baseline energy expenditure for survival and is not influenced by activity levels or food intake, it is typically the greatest contributor to calorie expenditure.
5. Conclude that BMR is the correct answer because it consistently represents the largest portion of an individual's total calorie expenditure compared to EAT, NEAT, and TEF.