Which of the following statements about the striated muscles is incorrect ?
(1) In the centre of each l-band is an elastic fibre (Z-line) which bisects it
(2) Thin filaments are limly attached to the Z-line
M-line is a fibrous membrane in the middle
of A-bands
None of these
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In the centre of each l-band is an elastic fibre (Z-line) which bisects it is the correct answer
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The Z-line defines the lateral boundaries of the sarcomere and anchores thin, titin and nebulin filaments. Because of these anchoring properties, Z-lines are responsible for force transmission, generated by the actin–myosin cross-bridge cycling.
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