To analyze this assertion and reason, let’s break down the information and examine it step-by-step:
Assertion (A): An athlete sometimes gets muscle cramps during vigorous exercise.
This statement is generally true. Muscle cramps are indeed a common occurrence during intense physical activity.
Reason (R): Due to the lack of oxygen and increased production of carbon dioxide in the muscle cells, pyruvic acid is converted into acid.
This reason contains some correct elements but also some inaccuracies. Let’s examine it:
1. Lack of oxygen: During intense exercise, muscles may experience a temporary lack of oxygen (hypoxia).
2. Increased CO2 production: This is correct. Intense exercise leads to increased CO2 production in muscle cells.
3. Pyruvic acid conversion: The statement is partially correct but oversimplified. In the absence of sufficient oxygen (anaerobic conditions), pyruvic acid is converted to lactic acid, not just “acid.”
Analyzing the relationship between A and R:
1. The reason (R) attempts to explain the cause of muscle cramps mentioned in the assertion (A).
2. While the accumulation of lactic acid can contribute to muscle fatigue, it’s not the primary cause of muscle cramps as implied.
3. Muscle cramps during exercise are more commonly associated with factors such as:
- Dehydration
- Electrolyte imbalances (especially sodium and potassium)
- Muscle fatigue
- Inadequate blood flow
4. The conversion of pyruvic acid to lactic acid is part of anaerobic respiration, which can contribute to muscle fatigue but is not directly responsible for cramps.
Conclusion:
The assertion (A) is correct, but the reason (R) is only partially correct and does not fully or accurately explain the cause of muscle cramps. While the build-up of lactic acid can contribute to muscle fatigue, it’s not the primary cause of cramps as implied by the reason given. The relationship between muscle cramps and lactic acid production is more complex than suggested here.
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