MCAT Biology : Circulatory System

Study concepts, example questions & explanations for MCAT Biology

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Example Questions

Example Question #923 : Systems Biology And Tissue Types

In what form is carbon dioxide usually circulated in human blood?

Possible Answers:

Bicarbonate ion

Carbon monoxide gas

Carbonic acid

Carbon dioxide gas

Carbonate ion

Correct answer:

Bicarbonate ion

Explanation:

Carbon dioxide is usually circulated in human blood in the form of , or bicarbonate. This is an important part of the blood buffering system, as the bicarbonate ion is the conjugate base of carbonic acid.

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