MCAT Question of the Day
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    Q:

    		 Amphibians have 3-chambered hearts which have two atria and a single ventricle which outputs to pulmonary and systemic circulation. Compared to a 4-chambered heart, the amphibian heart can be expected to have:
    		 

    A

    		 single circulation rather than double circulation.

    B

    		 lower levels of oxygenated blood reaching pulmonary circulation.

    C

    		 decreased efficiency of oxygen-delivery to the tissues.

    D

    		 higher levels of oxygenated blood reaching systemic circulation.



    Circulatory System |
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