Exam 5: The Cell: Transport Mechanisms and Cell Permeability

A dialysis sac that is permeable to glucose and water is filled with water and placed in a beaker containing 20% glucose solution. Will there be a net transport of glucose across the dialysis sac? If so, in which direction will the glucose move, into the sac or out of the sac?

Two important passive processes for membrane transport are _ .

Membrane transport may be passive or active. Select the active process from the list below.

Filtration is a non-selective, passive process in which water and solutes are forced through a membrane by hydrostatic pressure. The following property limits movement of some solutes.

Which of the following statements is true?

Which substance uses a carrier protein to cross the plasma membrane by facilitated diffusion?

Red blood cells placed in 5% sodium chloride solution will .

In this organ, filtration is the important first step in producing urine.

These molecules move through the lipid portion of the plasma membrane by simple diffusion.

Select the statement about selective (or differential) permeability that is false.

Active processes .

Does potassium permanganate diffuse more rapidly through water or through agar gel? Why?

Red blood cells placed in a hypotonic solution will _.

A membrane transport process is active if it requires .

Molecule A has a molecular weight of 175 and Molecule B has a molecular weight of 450. A 0.1 M solution of each is placed on agar gel. Which molecule will diffuse more rapidly through the agar?

The following substances enter cells by receptor-mediated endocytosis.

In comparing simple diffusion to facilitated diffusion, you note that _.

A dialysis sac that is permeable to glucose and water is filled with water and placed in a beaker containing 20% glucose solution. Will there be a net transport of water across the dialysis sac? If so, in which direction will the water move, into the sac or out of the sac?

The force that causes water and solutes to cross cell membranes by filtration is _ .

A(n) in molecular size and a(n) in temperature result in an increased rate of diffusion.