It would be almost as startling as your heart giving a quick double beat. But there are enough variants to satisfy any free-market economist, to fill any ecological niche, to endlessly delight neurophysiologists. Physics and mathematics can be most elegant, but the real world does not always cooperate with our aesthetic enthusiasms. Indeed, Ptolemy's belief that only perfect circles could be the building blocks of the universe sidetracked astronomy for fifteen centuries. Hopefully the aesthetics of computers and the appeals of reductionism will not similarly sidetrack neurobiology.
Neural reality is much richer, more diverse, with many levels between membranes and brains.
A level above membranes lie cells, with their regional specializations of different kinds of membrane. Above cells lie circuits of different kinds of cells. Nor to merely an analogy with computer hardware of recent design. Evolution has, after all, been tinkering around with thinking machines for a lot longer than computer science has. Brains are the most elegantly organized bundles of matter in the universe.