Exam 6: Movement Across Plasma Membranes

Which of the following describes the plasma membrane?

Two solutions are separated by a semipermeable membrane with the same properties as a cell membrane. Solution A is a 5 percent salt and solution B is 10 percent salt. Under these conditions, which of the following would most likely occur?

In a 2 percent aqueous solution of some salt, water makes up the remaining ________ percent.

________ is the net movement of substances from a region of greater concentration to a region of lesser concentration.

Which of the following statements is correct regarding diffusion?

The ________ the solute concentration, the ________ the osmotic pressure of the solution

In a 10 percent aqueous solution of some salt, the salt is the solute and occupies 10 percent of the solution volume; the solvent-water-makes up the remaining ________ percent of the solution volume.

Small molecules, such as water and many ions, cross the membrane without assistance from the cell. This movement is called ________ and requires NO energy expenditure by the cell.

________ is the net movement of water through a selectively permeable membrane, from a region of greater water concentration to a region of lesser water concentration.

All of the following are guidelines for using the oil-immersion lens EXCEPT which statement?

Passive membrane transport processes include ________.

________ is motion that causes molecules in gases and liquids to bump into adjacent molecules.

Which of the following CANNOT diffuse through the plasma membrane?

All of the following are guidelines for cleaning the oil-immersion lens EXCEPT which statement?

All of the following are found associated with the cell membrane EXCEPT ________.