PHYSIOLOGY
MUSCLE CONTRACTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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terminate, return, Mg, sliding, rest
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return, terminate, sliding, Mg, rest
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sliding, Mg, return, terminate, rest
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terminate, Mg, return, rest, slide
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Detailed explanation-1: -The sliding filament theory explains how myosin and actin interact to cause a muscle contraction. There are 5 stages: resting, excitement-contraction, contraction, recharge, and relaxation.
Detailed explanation-2: -Ca++ pumped back in sarcoplasmic reticulum. release of Ca++ from troponin. cessation of interaction between actin and myosin.
Detailed explanation-3: -AChE decomposes ACh and the muscle fiber membrane is no longer stimulated. Potassium ions leave the muscle cell causing repolarization. Calcium ions are actively transported back into the sarcoplasmic reticulum. Linkages between actin and myosin filaments break. Actin and myosin filaments slide apart. More items
Detailed explanation-4: -Action potential travels down motor neuron. Acetylcholine (ACH) released into sarcolemma. Action potential on sarcolemma. Sodium ions (Na+) rush into muscle cell. Calcium (Ca+) released from cisternae. Myosin heads attach to actin. Muscle contracts.