Exam 5: Biological Membranes

MATCHING a.Transmit information into cell d.Use ATP to transport solutes b.Catalyze reactions which take place within or along membrane surface e.Anchor cell to extracellular matrix c.Allow selective transport of ions or molecules -channels

Which of the following functions best explains the reason for the asymmetrically oriented structure of the proteins in the cell membrane?

The higher the concentration of solute in a solution, the __________ the effective water concentration and the __________ the osmotic pressure.

Studies of glucose transport in liposomes have revealed that:

In cells that are constantly involved in secretion, an equivalent amount of membrane must be returned to the interior of the cell for each vesicle that fuses with the plasma membrane; if this does not occur, then what would happen?

Facilitated diffusion:

Solutions that are isotonic:

Cholesterol within membranes functions as a(n) __________ through its interactions with both hydrophobic and hydrophilic parts of phospholipids.

Compare and contrast the mechanisms of the sodium-potassium pump and glucose-sodium cotransport systems.

Biological membranes are normally permeable to:

Which of the following molecules is least likely to cross a cellular membrane by simple diffusion?

A person has a genetic disease that prevents the phospholipids in the plasma membrane of the white blood cells from freely fusing with the other membranes within the cell.How would this disease affect phagocytosis?

The structures in this figure:

If solution of A is hypotonic to B, then the direction of net movement of water is B to A . __________________

An ABC transporter:

Proteins that are destined to become associated with the inner surface of the plasma membrane are:

What is meant by the term "fluid mosaic model"?

Figure 5-1 Use the figure to answer the corresponding question(s). -Refer to Figure 5-1.Which of the following statements about the red blood cells in Figure B is true?

Integral proteins:

Biological membranes are one dimensional fluids. __________________