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Which statement best describes myofibrils in muscle tissue?
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4. Tissues & Histology
Introduction to Muscle Tissue
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What is the major source of energy for muscles during short, intense exercise?
A
ATP
B
Amino acids
C
Glucose
D
Fatty acids
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Understand the types of energy sources available for muscle activity: ATP, amino acids, glucose, and fatty acids.
Recognize that ATP (adenosine triphosphate) is the immediate source of energy for muscle contractions.
During short, intense exercise, muscles require rapid energy, which is primarily supplied by ATP.
Glucose can be broken down quickly to regenerate ATP through glycolysis, but it is not the direct source of energy.
Fatty acids and amino acids are used for energy during prolonged exercise, not short bursts, due to slower metabolic processes.
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