Calcium transients in the (a) submembrane shell and (b) cell core (central shell) for different total numbers of shells. Black line: 11 shells. Gray dashed line: 4 shells. Blue dotted line: 2 shells. Diameter is 4 μm and the submembrane shell is 0.1 μm thick. Other shells equally subdivide the remaining compartment radius. All other model parameters are as in Figure 6.5.
Note that the simulation plots correctly show the calcium transients all beginning after the stimulus at 20 msecs, unlike the figure in the book in which part (b) has a spurious time shift! (This is a drawing error, not a simulation error).