The reaction h+ + hco3â€"" < --> h2co3 is a part of the respiration process. it takes place at . a. the lungs and tissue cells b. neither the lungs nor tissue cells c. the tissue cells d. the lungs

The tissue cells

Explanation:

I think you mean this

It all starts from Carbondioxide. This Carbondioxide is dissolved in the blood and taken by red blood cell and converted into carbonic acid. It then dissociates to form a bicarbonate ion and a hydrogen ion

This <--> means that the whole process is reversible. It is a buffer system to maintain the pH in the blood and duodenum. And also to support proper metabolic function.

i'm assuming that the correct answer is indeed the first one/ "a"..