Question

Respiratory Quotient (RQ) is denned as

• A. volume of $ O_{2}/ $ volume of $ CO_{2} $
• B. volume of $ CO_{2}/ $ volume of $ O_{2} $
• C. volume of $ O_{2}/ $ volume of $ N_{2} $
• D. volume of $ N_{2}/ $ volume of $ CO_{2} $

Answer 1

Answer: (B)

Respiratory Quotient is defined as the ratio of volume of carbondioxide evolved, to the volume of oxygen consumed per unit time per unit weight.
$RQ =\frac{\text { Volume of } CO _{2} \text { evolved }}{\text { Volume of } O _{2} \text { absorbed }}$
The RQ depends upon the nature of the substrate, which is oxidized in respiration.