Question

while performing strenuous exercise, a person may experience a temporary shortage of oxygen. as a result, anaerobic respiration supplies the required energy. what is an end - product that will build up in the persons muscles?
o pyruvate
o lactic acid
o ethyl alcohol
o glucose

Explanation:

During strenuous exercise with oxygen shortage, anaerobic respiration occurs in human muscles. Glucose is converted to pyruvate first, and then pyruvate is converted to lactic acid. Ethanol is a product of anaerobic respiration in some plants and yeasts, not in human muscles. Glucose is the starting - material for respiration, not the end - product that builds up in muscles during such exercise.

Answer:

C. Lactic acid