<prompt> Trace B best describes the kinetics of which of the following events?Transpo of Ca into the sarcoplasmic reticulum of a smooth muscle cellTranspo of K into a muscle cellTranspo of Na out of a nerve cellTranspo of O2 across an aificial lipid bilayer  <response>: Trace B is indicative of a process not limited by an intrinsic Vmax -excludes active transpo and facilitated diffusion. Therefore, of the choices provided, only the rate of transpo of O2 across an aificial lipid bilayer simple diffusion would be accurately reflected by trace B. 