<prompt> Facilitated diffusion is characterized by all exceptVmaxCompetitive inhibitionRequires energySpecificity  <response>: This process is called passive transpo orfacilitated diffusion, and does not require energy. The solute can move uphill, from regions of lower to higher concentration. This process is called active transpo, and requiressome form of chemical energy. Ref ganongs review of medical physiology 25e p102 