4.06 Quiz: How Muscles Contract

Question: Which of the following is correct about a muscle contraction?

Answer: Myosin heads attach to sites on actin filaments.

Question: Which structure is composed of the filaments actin and myosin?

Answer: myofibril

Question: Which statement is correct about how muscles move bones?

Answer: The insertion is where a muscle attaches to the bone it wants to move.

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