Question

in one passage through a bed of systemic blood capillaries, the blood gives up about what percentage of its oxygen?
multiple choice
5% to 10%
10% to 15%
20% to 25%
30% to 40%
70% to 85%

Explanation:

When blood passes through systemic capillaries, it undergoes gas exchange. Oxygen diffuses from the blood to the tissues. Under normal resting conditions, approximately 20 - 25% of the oxygen carried by the blood is released to the tissues in one passage through the systemic capillary bed. This is based on physiological knowledge of gas exchange in the circulatory system.

Answer:

20% to 25%