Dear wellwisher, it is worderful that you are trying to work out entropy (decrease or increase) at the membrane level. Generally, for all life processes there is a DECREASE in entropy. But all catabolic processes in the cell like glycolysis, cellular respiration result in an INCREASE in entropy. But the ultimate purpose of all the energy consumed by the cell (or organism as a whole) is to uphold the membrane potentials across the membrane, which results in increased entropy. Membrane potentials manifest as alertness.