Which of the following energy sources would provide the majority of the ATP for a person running a 26-mile marathon?
a. Stored ATP
b. Glycolytic catabolism
c. Oxidative catabolism
d. Creatine phosphate

검증된 단계별 안내

Understand the context of the problem: A marathon is a long-duration, endurance activity that requires sustained energy production over several hours. This means the body must rely on energy systems capable of producing ATP efficiently over a prolonged period.

Review the energy systems: The body has several ways to produce ATP: (a) Stored ATP, which is limited and only lasts a few seconds, (b) Glycolytic catabolism, which provides ATP quickly but is limited to short bursts of activity and produces lactic acid, (c) Oxidative catabolism, which is slower but highly efficient and sustainable for long durations, and (d) Creatine phosphate, which provides a rapid but very short-term supply of ATP.

Eliminate options that are not suitable for a marathon: Stored ATP and creatine phosphate are used for very short-term, high-intensity activities (lasting seconds). Glycolytic catabolism is more suited for moderate-duration, high-intensity activities (lasting a few minutes) and is not efficient for long-duration events like a marathon.

Focus on oxidative catabolism: This system uses oxygen to break down carbohydrates, fats, and sometimes proteins to produce ATP. It is the primary energy source for endurance activities because it can sustain ATP production for hours.

Conclude that oxidative catabolism is the most appropriate energy source for a marathon runner, as it provides the majority of ATP required for prolonged, steady-state exercise.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

ATP Production

Adenosine triphosphate (ATP) is the primary energy currency of the cell, providing the energy needed for various biological processes. During prolonged physical activities, such as running a marathon, the body relies on different metabolic pathways to produce ATP, with varying efficiency and duration.

Glycolytic Catabolism

Glycolytic catabolism refers to the breakdown of glucose to produce ATP, primarily through anaerobic processes. This pathway is crucial during high-intensity activities but is limited in duration, typically providing energy for activities lasting up to a few minutes before transitioning to more sustainable energy sources.

Oxidative Catabolism

Oxidative catabolism is the process of producing ATP through the aerobic breakdown of carbohydrates, fats, and proteins. This pathway is highly efficient and can sustain energy production for extended periods, making it the primary source of ATP during endurance activities like marathon running.

Which of the following energy sources would provide the majority of the ATP for a person running a 26-mile marathon?a. Stored ATPb. Glycolytic catabolismc. Oxidative catabolismd. Creatine phosphate