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When a person exercises extremely vigorously, the producs of the metabolism of glucose are latic acid & water.?
At a less vigorous level of exercise, glucose is completely metabolized into carbon dioxide and water. Which of the following statements best explains why lactic acid is produced in one reaction and carbon dioxide is produced in the other?
A.in vigorous exercise, enzymes are unable to keep up with the reaction.
B.in vigorous exercise, water collects i the cells.
C.in vigorous exercise, there is insufficient oxygen for complete combustion of glucose.
D.lactic acid is more useful by-product.
1 Answer
- 1 decade agoFavorite Answer
The answer is of course C. You need to understand the metabolism of Glucose first. Glucose enters first into a glycolytic pathway. In this pathway, glucose first gets converted to Glucose-1-phosphate and then undergoes series of reactions to enter Lactic acid. In case of oxidative pathway ( when plenty of Oxygen available), it gets converted to pyruvic acid which enters Tri Carboxylic acid cycle which converts it ultimately to carbon di oxide and water. If you vigorously workout, oxygen being insufficient, lactic acid accumulates. Of course, thereafter fatigue sets in and you cannot go on.
