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VO2 Normal — FRCA Primary MCQ

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EasyPhysiology - RespiratoryVO2 NormalFRCA Primary

Oxygen consumption at rest in a 70 kg adult is approximately:

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Correct answer: B — 250 mL/min

Normal resting oxygen consumption (VO2) is approximately 250 mL/min (3.5 mL/kg/min). CO2 production is approximately 200 mL/min (giving RQ 0.8). During maximal exercise VO2 can increase to approximately 3000-4000 mL/min in trained athletes.

Reference: Power Kam 2018 Principles of Physiology for the Anaesthetist