PHYSIOLOGY
SKELETAL MUSCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The area of interconnecting actin molecules, also known as the ends of a sarcomere, is called the
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I zone
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Z line
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M line
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A band
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Explanation:
Detailed explanation-1: -Because actin is tethered to structures located at the lateral ends of each sarcomere called z discs or “z bands, ‘’ any shortening of the actin filament length would result in a shortening of the sarcomere and thus the muscle.
Detailed explanation-2: -The z line of the skeletal muscle is the functional end point of the sarcomere and is composed of the protein actin, also known as the thin filament.
Detailed explanation-3: -Z-lines define the boundaries of each sarcomere. The M-line runs down the center of the sarcomere, through the middle of the myosin filaments. The I-band is the region containing only thin filaments. The H-zone contains only thick filaments.
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