Question:
Given below are two statements:
Statement (I): There is accumulation of lactic acid in skeletal muscles during vigorous exercise.
Statement (II): Lactic acid is reconverted into pyruvic acid during resting stage of skeletal muscles.
In light of the above statements, choose the most appropriate answer from the options given below.
Given below are two statements:
Statement (I): There is accumulation of lactic acid in skeletal muscles during vigorous exercise.
Statement (II): Lactic acid is reconverted into pyruvic acid during resting stage of skeletal muscles.
In light of the above statements, choose the most appropriate answer from the options given below.
Statement (I): There is accumulation of lactic acid in skeletal muscles during vigorous exercise.
Statement (II): Lactic acid is reconverted into pyruvic acid during resting stage of skeletal muscles.
In light of the above statements, choose the most appropriate answer from the options given below.
Show Hint
Lactic acid builds up when oxygen is short and is converted back to pyruvic acid at rest.
Updated On: Nov 12, 2026
- Both Statement (I) and Statement (II) are correct.
- Both Statement (I) and Statement (II) are incorrect.
- Statement (I) is correct but Statement (II) is incorrect.
- Statement (I) is incorrect but Statement (II) is correct.
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept
When oxygen is short, pyruvic acid is reduced to lactic acid by lactate dehydrogenase.
Step 2: Statement I
During vigorous exercise the oxygen supply to skeletal muscle falls short, so lactic acid accumulates and causes fatigue. This is correct.
Step 3: Statement II
At rest, oxygen is available again and lactic acid is oxidised back to pyruvic acid. Part is respired and part goes to the liver to remake glucose (Cori cycle). This is also correct.
Final Answer:
Both statements are correct. \[ \boxed{\text{(A) }\text{Both Statement (I) and Statement (II) are correct.}} \]
When oxygen is short, pyruvic acid is reduced to lactic acid by lactate dehydrogenase.
Step 2: Statement I
During vigorous exercise the oxygen supply to skeletal muscle falls short, so lactic acid accumulates and causes fatigue. This is correct.
Step 3: Statement II
At rest, oxygen is available again and lactic acid is oxidised back to pyruvic acid. Part is respired and part goes to the liver to remake glucose (Cori cycle). This is also correct.
Final Answer:
Both statements are correct. \[ \boxed{\text{(A) }\text{Both Statement (I) and Statement (II) are correct.}} \]
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