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Osmosis is best defined as the movement of water

  • A.in whichever direction the cell chooses
  • B.only through gaps between the phospholipids
  • C.from a dilute to a more concentrated solution
  • D.from a concentrated to a more dilute solution

Answer: C

Water moves down its own potential gradient, which means towards the solution with more dissolved particles dissolved in it. Aquaporins greatly speed the process, though a little water also crosses the bilayer directly between the phospholipids.

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