Muscle cramps after hard running may be related to formation of which substance?
Answer and explanation
Correct answer: Lactic acid
The governing concept is anaerobic respiration in muscles. During intense running, the oxygen supply may temporarily be insufficient for the muscles’ energy demand. Muscle cells then partially break down glucose without enough oxygen, producing lactic acid and releasing less energy. Accumulation of lactic acid is associated with fatigue and cramps in the school-level explanation. Therefore option A is correct; bile, starch and urea have different biological roles.
Frequently asked questions
What is the correct answer to this question?
Lactic acid
Why is this the correct answer?
The governing concept is anaerobic respiration in muscles. During intense running, the oxygen supply may temporarily be insufficient for the muscles’ energy demand. Muscle cells then partially break down glucose without enough oxygen, producing lactic acid and releasing less energy. Accumulation of lactic acid is associated with fatigue and cramps in the school-level explanation. Therefore option A is correct; bile, starch and urea have different biological roles.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Life Processes.
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