MUSCLE
SKELETAL MUSCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A skeletal muscle twitch differs from a tetanic contraction in that:
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the tetanic contraction is considered abnormal, while the twitch is a normal muscle response
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the muscle twitch is prolonged and continuous while a tetanic contraction is brief and “jerky”
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the muscle twitch is a brief and “jerky” movement, while the tetanic contraction is prolonged and continuous
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the tetanic contraction is caused by a single stimulus, while the twitch is caused by very rapid multiple stimuli
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Explanation:
Detailed explanation-1: -In tetanic contractions, the force increases within several (fast motor units) or even several tens (slow units) of initial stimuli, and then stabilizes at a certain level.
Detailed explanation-2: -Muscle twitching is caused by minor muscle contractions in the area, or uncontrollable twitching of a muscle group that is served by a single motor nerve fiber. Muscle twitches are minor and often go unnoticed. Some are common and normal. Others are signs of a nervous system disorder.
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