If we were to measure the relaxation time of a muscle after undergoing tetanus compared to...
If we were to measure the relaxation time of a muscle after undergoing tetanus compared to the relaxation time of the same muscle after undergoing a twitch, we would find that the relaxation time after tetanus is much longer. Provide a logical physiological reason why this is the case.
Homework Answers
The relaxation period of a muscle is the time during which Ca2+ are returned to the sarcoplasmic reticulum by active transport.
The relaxation rate of fast skeletal muscle at the end of tetanic stimulation critically depends upon tetanus duration.
The relaxation time of muscle after undergoing tetanus is much longer than the relaxation time of twitch. The rate of contraction in tetanus case is very high than that of twitch. Since twitch is a sudden and short or convulsive movement the rate of contraction is low. Since tetanus have the high contraction time, the rate of relaxation will would be slower. It takes time to a large amount of calcium in the cytoplasm to be taken up by sarcoplsmic reticulum.
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