Myofibrils Are Composed of Smaller Structures Called _______ That Are

Q22: The biceps (brachii) and triceps work _

Q23: The overlapping of myosin and actin filaments

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Q25: The immediate source of energy for muscle

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Q28: The attachment of the muscle to the

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Q30: _ are the basic units of muscle

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Q32: The _ muscle extends and rotates the