What is the normal value for the respiratory exchange ratio?
A) 0.8
B) 1.0
C) 0.6
D) 1.25

Question

Quizplus · Accepted Answer

The respiratory exchange ratio (RER) is the ratio of carbon dioxide (CO2) produced to oxygen (O2) consumed during respiration. The normal value for RER is 0.8, which indicates that the body is primarily using a mix of fats and carbohydrates for energy during exercise. Values above 1.0 indicate anaerobic metabolism, while values below 0.8 indicate the use of fats as the primary energy source. Therefore, the best choice is A) 0.8 as it represents a normal value.

What Is the Normal Value for the Respiratory Exchange Ratio