You discover a new species of bacteria that grows in aquatic environments with high salt levels. while studying these bacteria, you note that their internal environment is similar to the salt concentrations in their surroundings. you also discover that the internal salt concentrations of the bacteria change as the salt concentration in their environment changes. the new species can tolerate small changes in this way but dies from large changes because it has no mechanism for altering its own internal salt levels. what type of homeostatic mechanism is this species using to regulate its internal salt levels?

Na+ loss through sweet plus the dilution has lowered na+ concentration outside of neurons, altering the na+ equilibrium potential. sodium exists more outside the cells than inside. when na+ is lost by sweat plus the dilution( because they drink a lot of water) changes the concentration outside the cell, forcing the water to enter the cell and attempt to balance the concentration inside/outside.the problem is that the abundance of water will cause the cells to swell. most cells can adapt, however, the brain cells can't that's why the runner has confusion and can't control the muscles.  if not treated and this occurs in less than 48 hours, it can be immediately fatal .