The capillary "washout" phase occurs when:
A) anaerobic metabolism causes the postcapillary sphincters to remain constricted, causing capillary fluid engorgement.
B) postcapillary sphincters relax, releasing accumulated hydrogen, potassium, carbon dioxide, and thrombosed red blood cells.
C) cellular ischemia causes the postcapillary sphincters to remain constricted, causing the capillaries to become engorged with fluid.
D) precapillary sphincters constrict in response to the buildup of lactic acid, vasomotor failure, and increased carbon dioxide.
Answer: B) postcapillary sphincters relax, releasing accumulated hydrogen, potassium, carbon dioxide, and thrombosed red blood cells.
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