Lab 1: Cell Transport Mechanisms and Permeability
 
Quizzes
 

1 .       Differential permeability can also be described as: (Choose all answers that apply.) [Hint]



2 .       Passive transport includes which of the following characteristics? (Choose all answers that apply.) [Hint]



3 .       Refer to Activity 1: Simulating Dialysis (Simple Diffusion). Which solute(s) did the 20 MWCO membrane exclude? (Choose all answers that apply.) [Hint]



4 .       Refer to Activity 1. Which solute(s) passed through the 100 MWCO membrane? (Choose all answers that apply.) [Hint]



5 .       Refer to Activity 1. Which solute demonstrated the highest diffusion rate through the 100 MWCO? [Hint]



6 .       Refer to Activity 2: Simulating Facilitated Diffusion. Which solute(s) were able to travel against their concentration gradients? (Choose all answers that apply.) [Hint]



7 .       Refer to Activity 2. Two ways that the rate of glucose transport could be increased are: 



8 .       Refer to Activity 2. Which of the other solutes affected the rate of glucose diffusion? (Choose all answers that apply.) 



9 .       Refer to Activity 3: Simulating Osmotic Pressure. Under which type of transport process is osmosis included? (Choose all answers that apply.) [Hint]



10 .       Refer to Activity 3. Which of the membranes excluded water movement through the membrane? (Choose all answers that apply.) [Hint]



11 .       Refer to Activity 3. When solute concentration is __________, then osmotic pressure is __________. 



12 .       Refer to Activity 4: Simulating Filtration. The simulated filtration membrane is representative of the filtration membrane of what structure in humans? [Hint]



13 .       Refer to Activity 4. What characteristic of a solute determines whether or not it passes through a filtration membrane? 



14 .       Refer to Activity 5: Simulating Active Transport. Which carrier proteins affect Na+ transport? (Choose all answers that apply.) [Hint]



15 .       Refer to Activity 5. The ratio of Na+ to K+ transport is ____ Na+ transported out of the cell for every ____ K+ transported into the cell. [Hint]



16 .       What characteristic(s) of the semipermeable membrane used in the simple diffusion and filtration experiments determines which substances pass through them? (Choose all that apply) [Hint]



17 .       The left beaker contains 4 mM NaCl, 9 mM glucose and 10 mM albumin. The right beaker contains 10 mM NaCl, 10 mM glucose and 40 mM albumin. The dialysis membrane is permeable to all substances except albumin. In which direction will glucose move? 



18 .       The left beaker contains 4 mM NaCl, 9 mM glucose and 10 mM albumin. The right beaker contains 10 mM NaCl, 10 mM glucose and 40 mM albumin. The dialysis membrane is permeable to all substances except albumin. In which direction will water move? 



19 .       When food is pickled for human consumption, as much water as possible is removed from the food. What method is used to achieve this dehydrating effect? 



20 .       What determines whether a transport process is passive or active? 



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