MCAT Question of the Day
    •

    Q:

    		 The main function of the respiratory system is to exchange oxygen and carbon dioxide. In humans, which of the following best describes how nearly all of the oxygen is carried in the blood?
    		 

    A

    		 As gaseous O2

    B

    		 As erythroglobin

    C

    		 As hemoglobin

    D

    		 As bicarbonate



    Respiratory System |
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