Which of the following best describes the general structure of a cell membrane? (p. 139)

Which of the following functional processes results from the presence of protein within the plasma membrane? (p. 144)

Select the correct statement concerning membrane carbohydrates. (p. 143)

One consequence of the sidedness of the plasma membrane is that _____. (p. 143)

Why are phospholipids well suited to be the main structural components of membranes? (p. 144)

The membrane is referred to as a "fluid mosaic" structure. Which of the following statements is true? (p. 140)

Which of the following is NOT a function of membrane proteins? (p. 144)

The freeze-fracture method is an especially good technique to view ____________. (p. 140)

Stability of the plasma membrane is enhanced by _____. (p. 141)

All of the following are found in membranes EXCEPT _____. (p. 142)

The lipids in a cell membrane are arranged _____. (p. 139)

Phospholipids are well suited to serve as the major component of the plasma membrane because they _____. (p. 139)

Consider the currently accepted fluid-mosaic model of the plasma membrane. Where in the membrane would cholesterol most likely be found? (p. 142)

Consider the currently accepted fluid-mosaic model of the plasma membrane. Where in the membrane would oligosaccharides most likely be found? (p. 143)

Which of the following statements is true about passive transport? (p. 145)

Which one of the following molecules is most likely to diffuse freely across the lipid bilayer of the cell membrane without the involvement of a transport protein? (p. 145)

The movement of atoms, ions, or molecules from a region of higher concentration to regions of lower concentration is called _____. (p. 144)

Materials that readily cross the lipid portion of a cell membrane are typically _____. (p. 144)

Which one of the following statements is true about diffusion? (p. 145)

The concentration of solutes in a red blood cell is about 2%. Sucrose cannot pass through the membrane, but water and urea can. Osmosis would cause red blood cells to shrink the most when immersed in which of the following solutions? (p. 146)

Imagine two solutions separated by a selectively permeable membrane that allows water to pass, but not sucrose or glucose. The membrane separates a 0.2-molar sucrose solution from a 0.2-molar glucose solution. With time, how will the solutions change? (p. 146)

The diffusion of water across a selectively permeable membrane is called _____. (p. 146)

The internal solute concentration of a plant cell is about 0.8 M. To demonstrate plasmolysis it would be necessary to suspend the cell in what solution? (p. 147)

Which of these situations accurately represents osmoregulation in organisms? (p. 146)

Green olives may be preserved in brine, which is a 20–30% salt solution. How does this method prevent contamination by microorganisms? (p. 146)

Cells A and B are the same size and shape, but cell A is metabolically quiet and cell B is actively consuming oxygen. Oxygen will diffuse more quickly into cell ___ because _____________. (p. 145)

Plant cell cytoplasm is typically more concentrated than its environment, yet plant cells do not swell and burst because _____. (p. 147)

Sea water is dangerous to drink because ___________. (p. 146)

Which of the following would be least likely to diffuse through a cell membrane without the help of a transport protein? (p. 144)

Which of these statements describes what occurs in facilitated diffusion? (p. 147)

Which one of the following is NOT involved in facilitated diffusion? (p. 147)

Which of the following enables a cell to pick up and concentrate a specific kind of molecule? (p. 148)

Which of the following is a difference between active transport and facilitated diffusion? (p. 147)

The result of the operation of an electrogenic pump would be _____. (p. 150)

Active transport requires a cell to expend energy. Which of the following statements is NOT true? (p. 148)

The sodium-potassium pump is an example of _____. (p. 149)

Glucose is a six-carbon sugar that diffuses slowly through artificial membranes. The cells lining the small intestine, however, rapidly move glucose from the gut into their cytoplasm. This occurs no matter whether the gut concentrations of glucose are higher or lower than the glucose concentrations in intestinal cell cytoplasm. Using this information, which transport mechanism is most likely to be responsible for the glucose transport in intestinal cells? (p. 148)

A nursing infant is able to obtain disease-fighting antibodies, which are large protein molecules, from its mother's milk. These molecules probably enter the cells lining the baby's digestive tract via _____. (p. 151)

Which of these statements is true about cholesterol metabolism? (p. 151)

Which one of the following terms specifically refers to the intake of very large particles by cells? (p. 151)

Some liver cells ingest bacteria, a function probably accomplished by _____. (p. 151)