When O2 uptake by the tissues is abnormally low, as occurs in certain forms of dysoxia, what would you expect to find?

a. Decreased CaO2
b. Decreased CvO2
c. Decreased PaO2
d. Increased CvO2


ANS: D
Dysoxia is a form of hypoxia in which the cellular uptake of O2 is abnormally decreased. The best example of dysoxia is cyanide poisoning. Cyanide disrupts the intracellular cytochrome oxidase system, thereby preventing cellular use of O2.

Health Professions

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