Exam 5: Membranes

The following are all functions of a typical plasma membrane except

If a cell has the same concentration of dissolved molecules as of its outside environment,the cell's condition is called as being

As a scientist you perform an experiment in which you create an artificial cell with a selectively permeable membrane through which only water can pass.You put a 5M solution of glucose into the cell and you place that into a beaker of water.What observations do you expect to see?

Diapedesis is the movement of white blood cells through intact blood vessel walls into surrounding body tissue.It typically happens when an area of the body is injured or damaged,and an inflammation response is required.What role would you expect cell adhesion molecules to play in this process?

If a blood research laboratory is attempting to collect the content of human red blood cells,the researchers should use which of the following types of solutions to cause blood cell lysis (bursting)?

In bacteria,fungi,and plants the high internal pressure generated by osmosis is counteracted by the mechanical strength of their

Cholesterol functions in the plasma membrane to

Which of the following does not influence membrane fluidity?

The turgor pressure observed in plants is a direct result of the plant cells being _________________ to their environment.

Glycoproteins and glycolipids are examples of _________________ associated with the cell membrane.

If you were to replace the phosphate group of a phospholipid with a fatty acid chain,you would have

If you were a very thirsty cell,which process would you use to take in some nutrients secreted by one of your neighbors?

In individuals with normal blood sugar levels,glucose is reabsorbed into the bloodstream in the kidney by members of the GLUT transporter family,which form an aqueous pore across the membrane through which glucose can move in a passive manner.As a result,no glucose is excreted in urine.However,in people with untreated diabetes mellitus,blood sugar levels are high and glucose is often present in the urine.Which of the following best explains this occurrence?

If a cell has a normal osmotic pressure of 4500 mmHg and is placed into a solution with an osmotic pressure of 3500 mmHg,what will happen to the cell?

The part of a membrane protein that extends through the phospholipid bilayer is primarily composed of amino acids that are

Which of the following is not a part of the sodium-potassium pump?

Facilitated diffusion is an important method for cells in obtaining necessary molecules and removing other ones.Requirements for facilitated diffusion include which of the following?

While water continually orients phospholipids into a lipid bilayer,it does not fix the lipids permanently into position.Thus,the bilayer is considered to be _______ in nature.