What is the minimum amount of time that blood must take for pulmonary capillary transit for equilibration of O₂ to occur across the alveolar-capillary membrane?

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Quizplus · Accepted Answer

If blood flow increases, such as during heavy exercise, capillary transit time can decrease to as low as 0.25 sec. Even this short timeframe is adequate to ensure that equilibration takes place, as long as no other factors impair diffusion. However, in the presence of a diffusion limitation, rapid blood flow through the pulmonary circulation can result in inadequate oxygenation.

What Is the Minimum Amount of Time That Blood Must