PHYSIOLOGY
MUSCLE STRUCTURE FUNCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Z Line
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M Line
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H Zone
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None of the above
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Detailed explanation-1: -A sarcomere is defined as the segment between two neighbouring Z-lines (or Z-discs). In electron micrographs of cross-striated muscle, the Z-line (from the German “zwischen” meaning between) appears in between the I-bands as a dark line that anchors the actin myofilaments.
Detailed explanation-2: -I-band: The area adjacent to the Z-line, where actin is not superimposed by myosin. A-band: The length of a myosin within a sarcomere. M-line: The line at the center of a sarcomere to which myosin bind. Z-line: Neighboring, parallel lines that define a sarcomere.
Detailed explanation-3: -The area between two Z lines, a sarcomere, can be considered to be the primary structural and functional unit directly responsible for muscle contraction.…
Detailed explanation-4: -The Z-band (Z-line, Z-disc) defines the boundary of the sarcomere in striated muscle and bisects the I-band of neighbouring sarcomeres (Fig.