One strong possibility for the cause of this scenario is a hoof abscess--a localized accumulation of pus within the horse's hoof. The good news is that abscesses can often be resolved quickly and easily with proper veterinary care and leave no lasting damage.
A: The sodium-potassium pump is an essential cellular membrane protein that functions by pumping out three sodium ions and taking in two potassium ions. This mechanism preserves the electrochemical gradient formed from the varying concentrations of sodium and potassium ions within the cell and its exterior. Continue Reading
Glucose is sometimes transported by a symporter such as the sodium-glucose symporter which doesn't use ATP but rather uses the sodium gradient to facilitate transport of glucose across the cell membrane. One may argue that the sodium pumps provide the energy and that would be true in a sense.