HUMAN PHYSIOLOGY
LOCOMOTION AND MOVEMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Either A or B
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None of the above
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Detailed explanation-1: -The central part of the thick filaments that is not overlapped by thin filaments is called the ‘H’ zone.
Detailed explanation-2: -M-line: The line at the center of a sarcomere to which myosin bind. Z-line: Neighboring, parallel lines that define a sarcomere. H-band: the area adjacent to the M-line, where myosin is not superimposed by actin.
Detailed explanation-3: -M line-marks the middle of the sarcomere and contains the protein called myomesin. H zone-is the area between the M line and Z disc.
Detailed explanation-4: -Thick filaments are symmetrical about their midpoint at the M-line of the sarcomere, and thin filaments reverse polarity at the Z-line, so the fundamental functional unit of skeletal muscle is the half-sarcomere. The principal protein component of the thick filaments is the motor protein myosin.