What is the primary source of energy for sustained, long-term muscle contraction?
Understand the Problem
The question is asking about the main energy source our muscles use for prolonged contraction. To answer, we need to consider the different sources of energy mentioned and how they contribute to sustained muscle activity.
Answer
Aerobic respiration of carbohydrates and fats.
The primary source of energy for sustained, long-term muscle contraction is aerobic respiration of carbohydrates and fats, which provides ATP.
Answer for screen readers
The primary source of energy for sustained, long-term muscle contraction is aerobic respiration of carbohydrates and fats, which provides ATP.
More Information
During sustained, long-term activities, muscles primarily rely on the oxidative metabolism of carbohydrates and fats. This aerobic process efficiently produces ATP, which is the energy currency essential for continuous muscle contraction.
Tips
A common mistake is to assume that ATP is used only in short-term contractions. While ATP is the direct energy source, its regeneration during long-term contraction heavily relies on aerobic processes.
Sources
- Skeletal muscle energy metabolism during exercise - Nature - nature.com
- Energy Source for Muscle Contraction - EdTech Books - books.byui.edu
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