MUSCLE NERVE CARTILAGE BONE
SKELETAL MUSCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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M-line
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A-line
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Z-line
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I-line
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Detailed explanation-1: -Thin filaments are firmly attached to the M-line. c. The central part of thick filaments, not overlapped by thin filaments is called Z-band.
Detailed explanation-2: -Actin filaments are attached to the Z-line.
Detailed explanation-3: -In each sarcomere, thin filaments emanate from the Z-lines, stretching through the I-bands to overlap with thick filaments in the A-band.
Detailed explanation-4: -Thin filaments attach to a protein in the Z disc called alpha-actinin and occur across the entire length of the I band and partway into the A band.
Detailed explanation-5: -(i) Thin filaments are firmly attached to the Z-line . (ii) The light band is also called the I-band and contains mostly actin. (iii) A sarcomere is the functional unit of a myofibril between two adjacent A-bands .