PHYSIOLOGY
MUSCLE CONTRACTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Atrophy
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Hypertrophy
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Circumduction
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Rotation
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Detailed explanation-1: -Karina’s leg was in a cast for ten weeks. You would expect her leg muscles to experience some degree of: A. atrophy.
Detailed explanation-2: -Disuse atrophy is caused by mechanical unloading of muscle and this leads to reduced muscle mass without fiber attrition. Skeletal muscle stem cells (satellite cells) and myonuclei are integrally involved in skeletal muscle responses to environmental changes that induce atrophy.
Detailed explanation-3: -Elasticity is the ability to recoil or bounce back to the muscle’s original length after being stretched.
Detailed explanation-4: -Myasthenia gravis. Myopathy. Myositis, including polymyositis and dermatomyositis.
Detailed explanation-5: -Myoclonus refers to sudden, brief involuntary twitching or jerking of a muscle or group of muscles. The twitching cannot be stopped or controlled by the person experiencing it.