Fig. 1. (A) Steady-state intracellular pH values of Sipunculus nudus
isolated body wall tissue under normo- and hypercapnia, measured after
long-term exposure to media of different pH. *pHi significantly
different from the control value at pHe 7.9. (B) Intracellular bicarbonate
concentrations of isolated tissue exposed to media of different pH and
bicarbonate concentrations. Values are means ± S.D., N=5-6,
except for extracellular bicarbonate levels, which are media concentrations,
used to set the specific pHe, and therefore given without S.D.
