32) In which type of solution would equilibrium exist?

A) isotonic

B) hypertonic

C) hypotonic

D) osmotic

E) ionic

33) Two solutions are separated by a semipermeable membrane with the same properties as a cell membrane. Solution A is 5 percent glucose and solution B is 10 percent glucose. Under these circumstances,

A) water will move from solution A to solution B.

B) water will move from solution B to solution A.

C) glucose will move from solution A to solution B.

D) glucose will move from solution B to solution A.

E) at equilibrium the concentration of glucose will be higher in solution B.

34) Choose the correct description for the preceding image.

A) The cell is in a hypotonic saline solution.

B) Osmotic flow does not occur across the plasma membrane of the cell.

C) As the current condition of the cell continues, its plasma membrane may rupture or lyse.

D) The cell is in equilibrium with the solution in that as one water molecule moves out of the cell, another moves in to replace it.

E) As water moves out of the cell, crenation occurs.

35) The release of intracellular materials by a vesicle at the cell surface is called

A) osmosis.

B) active transport.

C) exocytosis.

D) endocytosis.

E) an ion exchange pump.

36) The process by which vesicles containing fluid are formed on the surface of a cell for transport into the cell is called

A) pinocytosis.

B) phagocytosis.

C) exocytosis.

D) receptor-mediated endocytosis.

E) ion exchange.

37) A mechanism in which two substances move in opposite directions across the cell membrane is called ________.

A) facilitated diffusion

B) vesicular transport

C) endocytosis

D) countertransport

E) osmosis

38) The movement of substances from an area of high concentration to an area of low concentration by interacting with a carrier molecule is an example of

A) osmosis.

B) active transport.

C) diffusion.

D) facilitated diffusion.

E) filtration.

39) A process that requires ATP energy to move a substance independently of its concentration gradient is called

A) active transport.

B) passive transport.

C) facilitated transport.

D) osmosis.

E) diffusion.

40) Which of the following is true of the sodium-potassium exchange pump?

A) It maintains sodium at equal intracellular and extracellular levels.

B) It is a passive transport process.

C) It moves sodium into the cell and potassium out of the cell.

D) It is only found in muscle cells.

E) It is an example of active transport.

41) The process of binding a specific molecule and then bringing it into the cell in a vesicle is called

A) exocytosis.

B) transcytosis.

C) phagocytosis.

D) receptor-mediated endocytosis.

E) pinocytosis.