Fig. 5.

Effect of vitelline membrane on pH_i and pH_S transients during the addition of CO₂/HCO₃⁻. A: pH_S trajectories. The six simulations correspond to six increasing values of the tortuosity factor γ. B: maximal height of the pH_S spike (positive direction) as a function of γ. The six colored dots correspond to the six simulations in A. C: pH_i trajectories, at a depth of ∼50 μm, corresponding to the simulations in A. D: maximal rate of pH_i change (negative direction) as a function of γ. The six colored dots correspond to the six simulations in A.