A very low level of oxygen in the cells is called ________
A) hypercapnia
B) cyanosis
C) carboxyhemoglobin
D) hypoxia
D
Explanation: A) Capn/o- means "carbon dioxide," not oxygen.
B) Cyanosis refers to the coloration of the skin with a low level of oxygen.
C) This is a laboratory test, not a disease.
D) Correct!
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