ACSM
010-111 · Question #17
010-111 Question #17: Real Exam Question with Answer & Explanation
The correct answer is D. Oxidative phosphorylation. Oxidative phosphorylation has the greatest capacity for ATP production among all energy systems, making it the primary pathway for sustained aerobic activity.
Question
Which energy system has the highest capacity for ATP production?
Options
- AATP-CP
- BRapid glycolysis
- CSlow glycolysis
- DOxidative phosphorylation
Explanation
Oxidative phosphorylation has the greatest capacity for ATP production among all energy systems, making it the primary pathway for sustained aerobic activity.
Common mistakes.
- A. The ATP-CP system provides only about 3 ATP per phosphocreatine molecule and is exhausted within approximately 10 seconds, giving it the lowest capacity despite its high power output.
- B. Rapid (anaerobic) glycolysis yields only 2 net ATP per glucose molecule and is limited by lactate accumulation, restricting both its capacity and duration.
- C. Slow glycolysis feeds into the oxidative pathway but does not independently generate ATP at a level comparable to the complete oxidative phosphorylation process.
Concept tested. Comparative ATP yield across energy systems
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