The greater the magnitude of the concentration gradient:   a.  the more rapid the rate of diffusion. b.  the more likely mediated transport is required. c.  the easier it is to reverse the flux. d.  the higher number of ATPs required to diffuse. e.  all of the above is true.

Statement 1: The direction of diffusion of a solute across a membrane is determined by its concentration gradient and always moves toward equilibrium. Statement 2: In passive transport, solutes move down the gradient from a region of low concentration to a region of high concentration. A Both statements are true. Both statements are false. C) Statement 1 is true. Statement 2 is false. Statement 1 is false. Statement 2 is true.

The pathway that can move highest rates of sodium ions is: A. Sodium channels B. Sodium pumps-ATPases C. Sodium exchangers D. Sodium diffusion in solution

Channels are an example of transporters with alternating gates; in other words, channels change conformation upon cargo binding to release the cargo on the opposite side of the membrane. True or False? Polar solutes must be ‘re-hydrated’ by the interactions with the transporter to allow for rapid transport. True or False? The sodium potassium pump is an example of an antiport. True or False?