Nano-scale solution of the Poisson-Nernst-Planck (PNP) equations in a fraction of two neighboring cells reveals the magnitude of intercellular electrochemical waves
Fig 7
Stationary solution of the potential, ϕ, the concentration of Na+, K+, Ca2+, and Cl− ions, and the charge density, ρ, along lines in the x-direction for open K+ channels and closed Na+ channels.
The full green line represents the solution along a line crossing through the K+ channels and the dotted black line represents the solution along a line about 100 nm below the K+ channel cluster. The light green areas mark the membrane. Note that all ion concentrations are zero in the membrane, except for K+ ions in the K+ channel. The coordinates on the axes are shifted so that x = 0 marks the center of the extracellular cleft, and to improve the visibility, the plots only focus on a small part of the intracellular space, closest to the membrane.