Question

Assertion: Intensive exercise leads to muscle cramps.
Reason: Ethanol is produced as a result of anaerobic respiration.

• A. Both A and R are true and R is the correct explanation of A
• B. Both A and R are true but R is not a correct explanation of A
• C. A is true but R is false
• D. A and R are false

Answer 1

The correct option is B Both A and R are true but R is not a correct explanation of A

Anaerobic respiration occurs during high-intensity exercises. When our body works so hard there is a shortage of oxygen for energy consumption. Due to the shortage of oxygen, our body breaks down glucose stored in our muscles for energy. As a byproduct of the breakdown, lactic acid is formed. The buildup of lactic acid can cause muscle pain, cramps and muscle fatigue.
Ethanol is a product of anaerobic respiration in yeasts and this process is known as fermentation.