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Multiple Choice

Anoxia is best described as which condition?

Anoxia means no oxygen reaches the tissues because the supply is cut off completely. This is different from simply having low oxygen levels (hypoxia), which is still a partial delivery of oxygen rather than none. Saying the oxygen supply is cut off completely captures that there is an absence of delivered oxygen to the cells, not just a reduced amount. The idea that oxygen exchange is enhanced is the opposite of anoxia, and while very low partial pressure of oxygen can occur in severe cases, anoxia is defined by a complete stoppage of oxygen delivery, not by a specific PO2 value.

Anoxia means no oxygen reaches the tissues because the supply is cut off completely. This is different from simply having low oxygen levels (hypoxia), which is still a partial delivery of oxygen rather than none. Saying the oxygen supply is cut off completely captures that there is an absence of delivered oxygen to the cells, not just a reduced amount. The idea that oxygen exchange is enhanced is the opposite of anoxia, and while very low partial pressure of oxygen can occur in severe cases, anoxia is defined by a complete stoppage of oxygen delivery, not by a specific PO2 value.