Comparison of a relaxed and contracted sarcomere
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Comparison of a relaxed and contracted sarcomere
(A) The basic organization of a sarcomere subregion, showing the centralized location of myosin (A band). Actin and the z discs are shown in red. (B) A conceptual diagram representing the connectivity of molecules within a sarcomere. A person standing between two bookcases (z bands) pulls them in via ropes (actin). Myosin (M) is analogous to the person and the pulling arms. (z bands are also called z discs.)
This image is linked to the following Scitable pages:
How do muscles contract? What molecules are necessary for a tissue to change its shape?
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