Effect of agents that alter cell calcium and microfilaments on CO2 stimulated H+ secretion in the turtle bladder.

CO2 addition to the serosal solution of turtle bladder stimulates H+ secretion. This stimulation of H+ secretion is thought to be mediated, at least in part, by exocytosis of vesicles containing H+ pumps that are inserted in the plasma membranes. In other systems, exocytosis is regulated by cell calcium and microfilaments.