Question at position 2 The main contributor to daily energy expenditure for the average person is the:thermic effect of physical activitythermic effect of a mealresting metabolic ratenone of the aboveClear my selection单项选择题
A
thermic effect of physical activity
B
thermic effect of a meal
C
resting metabolic rate
D
none of the above

Question

Question at position 2 The main contributor to daily energy expenditure for the average person is the:thermic effect of physical activitythermic effect of a mealresting metabolic ratenone of the aboveClear my selection单项选择题

A

thermic effect of physical activity

B

thermic effect of a meal

C

resting metabolic rate

D

none of the above

BlackTom AI · Accepted Answer

Resting metabolic rate (RMR) accounts for the largest share of an average person's total daily energy expenditure.

1) Relevant knowledge points and concepts
- Total Daily Energy Expenditure (TDEE) is made up primarily of: resting metabolic rate (RMR, also called basal metabolic rate in close usage), thermic effect of food (TEF, aka thermic effect of a meal), and the thermic effect of physical activity (PA). 
- Typical population averages: RMR ≈ 60–75% of TDEE, TEF ≈ 5–10% of TDEE, and physical activity ≈ 15–30% (highly variable).

2) Step-by-step reasoning
- Compare typical percentage contributions: RMR’s 60–75% is clearly larger than TEF’s ~10% and usually larger than PA’s typical range. Therefore RMR is the main contributor.

3) Example calculation with intermediate steps
- Take a sample TDEE of 2,000 kcal/day.
  - RMR (assume 70%): 0.70 × 2000 = 1,400 kcal/day
  - TEF (assume 10%): 0.10 × 2000 = 200 kcal/day
  - Physical activity (assume 20%): 0.20 × 2000 = 400 kcal/day
- Comparison: 1,400 kcal (RMR) > 400 kcal (activity) > 200 kcal (TEF). RMR is the largest single component.

4) Why the correct answer is correct
- RMR represents the energy required to maintain basic physiological functions (heart, lungs, brain, cellular metabolism) continuously, so by nature it consumes most daily calories. This physiological necessity explains its dominant percentage.

5) Why other options are incorrect
- Thermic effect of physical activity: important and variable but usually smaller than RMR for average individuals.
- Thermic effect of a meal: typically only ~5–10% of TDEE, far less than RMR.
- None of the above: incorrect because one of the listed options (RMR) is indeed the main contributor.

6) Conclusion
- Therefore the correct answer is resting metabolic rate, which matches the provided answer.

Question at position 2 The main contributor to daily energy expenditure for the average person is the:thermic effect of physical activitythermic effect of a mealresting metabolic ratenone of the aboveClear my selection单项选择题

类似问题

Question at position 7 Which of the following is a well-established metabolic adaptation to negative energy balance?build muscledecrease resting metabolismpreserve muscle massincrease appetite

Question at position 2 Which of the following may have the highest metabolic rate per unit mass?FatHeartMuscleBone

Question at position 6 An increase in ambient temperature will have what effect on energy metabolism?no effectincreasedecreasenot enough information

Question at position 11 With diet-induced weight loss, what happens to resting metabolic rate (RMR) or basal metabolic rate (BMR) over time?RMR or BMR increasesRMR or BMR decreasesRMR or BMR stays the same

The M in the abbreviation BMR stands for:

Resting metabolic rate

Due to a decreased metabolic rate in geriatric cats, energy requirements can decrease by as much as:

Taller people need proportionately more energy than shorter people to balance their energy budgets.

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单

Question at position 2 The main contributor to daily energy expenditure for the average person is the:thermic effect of physical activitythermic effect of a mealresting metabolic ratenone of the aboveClear my selection单项选择题

类似问题

Question at position 7 Which of the following is a well-established metabolic adaptation to negative energy balance?build muscledecrease resting metabolismpreserve muscle massincrease appetite

Question at position 2 Which of the following may have the highest metabolic rate per unit mass?FatHeartMuscleBone

Question at position 6 An increase in ambient temperature will have what effect on energy metabolism?no effectincreasedecreasenot enough information

Question at position 11 With diet-induced weight loss, what happens to resting metabolic rate (RMR) or basal metabolic rate (BMR) over time?RMR or BMR increasesRMR or BMR decreasesRMR or BMR stays the same

The M in the abbreviation BMR stands for:

Resting metabolic rate

Due to a decreased metabolic rate in geriatric cats, energy requirements can decrease by as much as:

Taller people need proportionately more energy than shorter people to balance their energy budgets.​

更多留学生实用工具

希望你的学习变得更简单

Taller people need proportionately more energy than shorter people to balance their energy budgets.