Question

A subject has their resting energy expenditure (REE) measured while breathing from a spirometer that has been filled with O2. This technique is described as:

A) Capnography
B) Pulse oximetry
C) Indirect calorimetry
D) Plethysmography

Answer 1

The correct technique for measuring REE with a spirometer is indirect calorimetry, which estimates energy expenditure by measuring oxygen consumption.

Step-by-step explanation:

The technique described for measuring resting energy expenditure (REE) while a subject breathes from a spirometer filled with O2 is known as indirect calorimetry.

This method is indirect because it involves measuring oxygen consumption to estimate energy expenditure rather than measuring heat production directly.

With the Benedict-Roth spirometer method, the rate of oxygen consumption can be recorded and calculated.

This is essential since energy consumption is directly proportional to oxygen consumption due to the oxidation process of food during digestion.

Therefore, option C) Indirect calorimetry is the correct answer to the question.