Question #169

A sheep takes up 320 ml of oxygen in one minute. Its venous and arterial blood contain 200 ml and 130 ml of oxygen per litre respectively. Its cardiac output is: 4.6 L / min
0.2 L / min
4.2 L / min
1.0 L / min
2.2 L / min

Applying the Fick Principle, cardiac output = oxygen extraction rate / arterio-venous concentration difference.

Cardiac output = 320 / (200 - 130) = 4.6 L / min

See A Thinking Approach to Physiology, pages 142 - 144.

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