When muscles lack oxygen, formation of which substance can cause pain?
Answer and explanation
Correct answer: Lactic acid
During strenuous exercise, the oxygen supply to working muscles may become insufficient for aerobic respiration. Muscle cells then obtain some energy by anaerobic breakdown of glucose, producing lactic acid. Its temporary accumulation is associated with fatigue, pain or cramps. Therefore, option A is correct. Glucose is the starting fuel, starch is a storage carbohydrate, and bile is a digestive secretion, so none of those is the substance described.
Frequently asked questions
What is the correct answer to this question?
Lactic acid
Why is this the correct answer?
During strenuous exercise, the oxygen supply to working muscles may become insufficient for aerobic respiration. Muscle cells then obtain some energy by anaerobic breakdown of glucose, producing lactic acid. Its temporary accumulation is associated with fatigue, pain or cramps. Therefore, option A is correct. Glucose is the starting fuel, starch is a storage carbohydrate, and bile is a digestive secretion, so none of those is the substance described.
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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