11. Which statements about transport across the cell membrane are correct?                         
a) The membrane is permeable to all molecules.
b) Passive transport requires energy in the form of ATP.
c) Neutral solutes move by simple diffusion from lower to higher concentration.
d) Movement of water by diffusion is called osmosis.
e) Polar molecules can easily pass through the nonpolar lipid bilayer.
f) Active transport moves molecules against their concentration gradient.
g) The Na+/K+ Pump is an example of passive transport.