In a resting state,the central part of the th | vedclass

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(C) In the structure of a sarcomere,the thick filaments (myosin) are located in the center of the $A$-band. During the resting state,the central porti

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$H$-zone

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(C) In the structure of a sarcomere,the thick filaments (myosin) are located in the center of the $A$-band. During the resting state,the central portion of the thick filaments is not overlapped by the thin filaments (actin). This specific central region is known as the $H$-zone. As the muscle contracts,the thin filaments slide over the thick filaments,causing the $H$-zone to narrow or disappear.

In a resting state,the central part of the thick filaments not overlapped by thin filaments is called the .....

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