The answer is hydrogen and chloride. The hydrogen ions are created within the parietal cells and conveyed transversely the apical membrane via an active transporter while at the same time, chloride moves crossways the apical membrane through ion channels. In addition, hydrogen ion is the nucleus of a hydrogen atom disconnected from its supplementary electron. The hydrogen nucleus is completed up of a constituent part resonant a unit positive electric charge which is known as a proton. The protected hydrogen ion characterized by the symbol H + is hence normally used to signify a proton.