Theory 31/Cellular/Cell volume
Volume Is Pump Against Leak
The claim
Steady-state cell volume is set by the ratio of pump rate to passive leak, so a cell with more channels is larger at the same pump density.
01Mechanism
Water follows osmotic balance; the pump sets the gradient that the leak dissipates, and the balance point sets volume.
02Prediction
Volume should track the ratio.
03Refutation
Volume tracking pump rate alone would remove leak.