Lecture 3 Multiple Choice Questions 1 Diffusion of

Lecture 3 Multiple Choice Questions

1 - Diffusion of solutes through a membrane with the use of a transport protein is called 1 - osmosis 2 - facilitated diffusion 3 - carrier-mediated transport 4 - active transport

2 - If transport through a cell membrane requires the expenditure of energy, it is called 1 - facilitated diffusion 2 - active transport 3 - simple diffusion

3 - Movement of water through a cell membrane, rather than solute, is called 1 - simple diffusion 2 - solvent diffusion 3 - osmosis

4 - Which of the following substances is least able to diffuse through a living cellular membrane? 1 - glucose 2 - carbon dioxide 3 - cholesterol 4 - water

5 - Ion channels in a cell membrane permit the selective passage of 1 - respiratory gases 2 - Na+ and K+ 3 - amino acids 4 - small organic wastes

6 - The number of molecules diffusing through a membrane per unit time (rate) depends on all of the following except the 1 - concentration of molecules on each side of the membrane. 2 - availability of ATP. 3 - permeability of the membrane to the molecules. 4 - surface area of the membrane.

7 - Two solutions are said to differ in ____ if they have different effects on the osmosis of water. 1 - tonicity 2 - molarity 3 - molality 4 - osmolality

8 - Red blood cells placed in a hypertonic solution will 1 - swell and eventually lyse. 2 - remain unchanged. 3 - crenate 4 - hemolyse

9 - The carrier proteins of cell membranes have many properties in common with enzymes, including all of the following except 1 - allosteric inhibition. 2 - specificity. 3 - saturation. 4 - competition.

10 - What two organs are the major sites for secondary active transport of glucose? 1 - liver, kidney 2 - GI tract, kidney 3 - brain, kidney 4 - brain, GI tract