In indirect calorimetry, REE stands for Resting Energy Expenditure and RQ stands for Respiratory Quotient. Which option best matches this?

• A. Resting Energy Efficiency and Respiratory Quality
• B. Resting Energy Expenditure and Respiratory Quotient
• C. Reactive Energy Expenditure and Respiratory Quality
• D. Resting Expenditure of Energy and Respiratory Quotient

Answer: (B)

In indirect calorimetry, the important terms describe what is being measured: Resting Energy Expenditure is the amount of energy the body uses at rest to maintain basic functions, and Respiratory Quotient is the ratio of carbon dioxide produced to oxygen consumed, reflecting which substrates are being burned for fuel. The pairing Resting Energy Expenditure and Respiratory Quotient matches the standard definitions used in this context, making it the best choice. The other options use nonstandard or misleading phrases such as energy efficiency, respiratory quality, or reactive energy, which do not define these measurements.