Figure 8. The role of CO2/ HCO3− buffer in hyposmosis-induced Ca2+ response.
Following replacement of the CO2/HCO3− buffer with 5 mm Hepes, application of 250 mosmol kg−1 failed to induce a Ca2+ response in 5 out of 6 cells tested. Hepes, added to the CO2/HCO3− buffer, did not influence the Ca2+ response (n = 6).