Human beings consume _______ liters of pure oxygen daily.
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Answer: A. 550
Explanation
An average adult human consumes several hundred liters of pure oxygen daily through normal respiratory processes. Cellular metabolism requires a continuous supply of oxygen molecules to produce ATP energy in aerobic tissues. The correct option is 550 liters because metabolic calculations place daily human oxygen consumption around this volume. Inhalation brings atmospheric air into the lungs, where oxygen diffuses across alveolar membranes into the bloodstream. Hemoglobin molecules inside red blood cells bind the oxygen and transport it to hungry tissues throughout the body. Resting metabolic rate and physical activity levels directly influence the exact volume of oxygen consumed daily.
2500 is far too high for daily oxygen consumption, representing an unrealistic volume for human respiration. 1050 overestimates the typical metabolic oxygen requirements of a standard resting adult human body. 10,000 is an extreme overestimate that exceeds normal human physiological capacity by a massive margin.
- Subject
- Everyday Science
- Category
- Everyday Science
- Topic
- —
- Difficulty
- medium
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