72. Define utilization coefficient as it pertains to hemoglobin and oxygen trans

Question

72. Define utilization coefficient as it pertains to hemoglobin and oxygen transport. Approximately how many oxygen molecules are removed from each hemoglobin molecule with each trip through systemic circulation under resting conditions? 73. Define venous reserve as it pertains to hemoglobin and oxygen transport. What percent under us reserve under resting conditions? What is the percentage under the saturation curve is veno the curve associated with utilization coefficient during strenuous exercise? How is venous reserve affected during periods of strenuous exercise? View as Text ^ 17 . I 47

Explanation / Answer

72) Utilisation coefficient is the amount of oxygen, carried in bound state with haemoglobin in blood, which diffuses into the tissues.

Approximately 25% of the bound oxygen is released for it to enter the tissues. Hence 1 oxygen molecule per haemoglobin molecule is released.

73) venous reserve is the amount of oxygen which is recycled back to the heart, in bound form with haemoglobin, after supplying to the tissues during one systemic circulation.

During resting condition the venous reserve is around 75%.

During strenuous exercise, the tissues are in excess need of oxygen to burn carbohydrates in order to generate energy, and hence the utilization coefficient increases to as high as 75-80%. Hence consequently, the venous blood goes down to a mere 20-25%.

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