1. As much as 50% of ideal body weight is gained during adolescence.

2. To estimate a person’s caloric requirement by calculation, their resting energy expenditure (REE) needs to be multiplied by the activity factor (AF) that best aligns with the person’s average physical activity level.

3. The major organs in the human body only make up about 10% of total body weight.

4. These major organs are highly active and expend about 50% of our basal metabolic rate.

Question

1.  As much as 50% of ideal body weight is gained during adolescence.

2.  To estimate a person’s caloric requirement by calculation, their resting energy expenditure (REE) needs to be multiplied by the activity factor (AF) that best aligns with the person’s average physical activity level.

3.  The major organs in the human body only make up about 10% of total body weight.

4.  These major organs are highly active and expend about 50% of our basal metabolic rate.

BlackTom AI · Accepted Answer

Adolescents can gain up to 50% of their eventual adult (ideal) body weight, so statement 1 is true. Growth during puberty is dramatic: much of the adult weight is accumulated in the adolescent growth spurt, and the phrase “as much as 50%” correctly describes the upper end of that contribution.

Relevant knowledge points:
- Adolescent growth: a large fraction of adult weight is gained during adolescence (up to ~50%).
- Energy requirement estimation: total energy need is estimated from resting energy expenditure (REE) multiplied by an activity factor (AF) that reflects habitual physical activity.
- Major-organ mass vs metabolic contribution: the brain, liver, heart and kidneys together represent only a small fraction of total body mass but consume a disproportionate share of basal metabolic rate (BMR).

Step-by-step reasoning:
1) Statement 1: True. Textbook pediatric/nutrition sources state that adolescence accounts for a very large share of adult weight gain—often cited as up to ~50%—so the statement is correct as written.
2) Statement 2: True. The standard approach to estimate caloric needs is: Total Energy Expenditure ≈ REE × Activity Factor (or Physical Activity Level). That directly validates statement 2.
3) Statement 3: False. Summing typical percentages: brain ≈ 2% of body mass, liver ≈ 2–3%, heart ≈ 0.4–0.6%, kidneys ≈ 0.4–0.6%; total ≈ 5–6% of body weight, not “about 10%.” Thus the claim that major organs make up ~10% is incorrect.
4) Statement 4: True. Despite their small mass, these organs are metabolically active and together account for roughly 50–60% of BMR (liver and brain ~20% each, heart and kidneys several percent each), so statement 4 is correct.

Why the correct answer is correct:
Three statements (1, 2, 4) are true and one (3) is false. The organ-mass versus metabolic-rate numbers are the key to rejecting statement 3.

Why other multiple-choice options are wrong:
- “Two” or “One” or “None” or “All four” are incorrect because the correct count is three true statements and one false.

Conclusion: Three of the four statements are true. This confirms the provided answer.

类似问题

Question at position 49 What can account for individual variations in basal metabolic rate even with the same amount of lean body mass?differences in activitydifferences in food intakedifferences in heightdifferences in number of uncoupling proteins

Question at position 3 Resting metabolism is determined by cellular energy production and is directly proportional to: Lean body massNumber of uncoupling proteinsNumber of adipocytesBody weight

Taller individuals have a higher basal metabolic rate (BMR).

Which of the following is a safe way to increase BMR?

A major factor influencing BMR is:

Which of the following is the most important factor that influences basal metabolic rate?

Total energy expenditure declines as we age.

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