PHYSIOLOGY
SYNAPTIC PHYSIOLOGY
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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-line
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Titin filaments
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Detailed explanation-1: -C Myofibrils The sarcomere consists of two overlapping bands called the anisotropic or A band and the isotropic or I band. Each I band is bisected by a narrow darkly staining Z line.
Detailed explanation-2: -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-3: -Light microscopists have long recognized that the physiological unit of muscle, the cell or fiber, contains repeating structures known as sarcomeres that are separated from each other by dark lines called Z disks.
Detailed explanation-4: -The Z-band (or Z-disk) is a dense fibrous structure made of actin, -actinin, and other proteins. Thin filaments (or actin filament) are anchored at one end at the Z-band. Titin is anchored to both the Z-band and the M-line. Thick filaments are anchored in the middle of the sarcomere at the M-line.