-What Is the Structure Indicated by the Number 1 in Figure

question 44

Multiple Choice

-What is the structure indicated by the number 1 in Figure 12.1 and what is its functional significance

• A) A band : length of myosin attached to an M line
• B) H zone : area of myosin not overlapped by actin
• C) Z line : anchors the thin filaments together
• D) M line : where the tails of the myosin molecules are bound to one another
• E) sarcomere : the functional unit of muscle contraction whose length is changed as a muscle shortens and lengthens

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