PHYSIOLOGY
SMOOTH MUSCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which is responsible for contraction and relaxation in non striated muscles?
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Striations
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Myofibrils
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Sarcoplasm
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Cilia
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Explanation:
Detailed explanation-1: -A myofibril is composed of many sarcomeres running along its length; thus, myofibrils and muscle cells contract as the sarcomeres contract.
Detailed explanation-2: -Myofibrils are essentially polymers, or repeating units, of sarcomeres. The shortening of the individual sarcomeres leads to the contraction of the individual muscle fibres, leading to muscle contractions..
Detailed explanation-3: -The sarcomere is the fundamental contractile unit of the myofibril. Z lines separate each sarcomere. The A bands, located at the center of each sarcomere, contain the thick filaments, which may overlap with thin filaments.
There is 1 question to complete.