Question:
Muscle fatigue is due to:
Muscle fatigue is due to:
Updated On: Jul 28, 2022
- lactic acid
- citric acid
- Na
- K
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The Correct Option is A
Solution and Explanation
Due to continuous contraction, a muscle exhausts its stored ATP and glycogen molecules and accumulates lactic acid, which gradually retards and finally stops the contraction activity of muscle cell. This situation is known as fatigue of a muscle.
After rest for some time, this fatigued muscle regains its contractivity. During rest time, the lactic acid is reconverted to be utilized in the formation of ATP.
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Concepts Used:
Parturition and Lactation
Parturition:
It is the process of the contraction of the uterus at regular intervals that helps in the delivery of the baby at the end of pregnancy. The signals that the fully developed fetus sends through the placenta for ejection is called Foetal ejection reflex. These signals induce muscular contractions.
The time period from fertilization to childbirth is called the gestation period.
Lactation:
It is the process of production of milk by the mammary glands at the end of pregnancy. The milk produced initially by the glands is called colostrum. This milk is crucial for the baby as it provides the child with initial immunity.