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Which protein blocks myosin from binding to actin when a muscle is at rest?

Which structure serves as the functional unit of a muscle fiber?

Which type of contraction occurs when a muscle lengthens while generating tension?

Which of the following best describes the function of the sarcoplasmic reticulum in muscle cells?

What is the role of the neuromuscular junction in muscle contraction?

What is the role of creatine phosphate in muscle contraction?

Which structure conducts action potentials deep into the muscle fiber?

A ballet dancer stands on their toes. What type of movement is occurring at the ankle?

A young athlete tears their rotator cuff while pitching a baseball. Which of the following muscles is most likely affected?

Which type of muscle contraction occurs when tension increases, but the muscle does not change in length?