PHYSIOLOGY
NEUROMUSCULAR JUNCTION TRANSMISSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A sarcomere extends from a ____ line to a ____ line.
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Z; Z
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Z:I
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Z; A
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A; I
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Explanation:
Detailed explanation-1: -A sarcomere extends from one Z disc to the successive Z disc. The Z disc serves to anchor the thin filaments to adjacent sarcomeres. Myofilaments occupy three-dimensional space. The arrangement of the myofilaments at different points in the sarcomere is shown in Figure 2-5, D and F.
Detailed explanation-2: -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. 1a) [1].
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