Differential Permeability Lab Report

Site Name: PhysioEx 8.0Author Name: Stabler, ZaoLocation on Site: Exercise > Lab Quiz 100% Correct of 20 items:20 Correct: 100%0 Incorrect: 0% Submitted on Sun Sep 27 2009 15:44:17 GMT-0600 (Mountain Daylight Time) --------------------------------------------------------------------------Question 1 Differential permeability can also be described as: Correct: the allowance of only certain substances to pass through a membrane without hindrance. Compare the molecule size and the MWCO for the membrane. --------------------------------------------------------------------------Question 2 Passive transport includes which of the following processes? Correct: Osmosis Passive transport includes osmosis. --------------------------------------------------------------------------Question
3 Refer to Activity 1: Simulating Dialysis (Simple Diffusion). Which of the following passed through the 20 MWCO membrane? Correct: Water Water is the only substance small enough to pass through the membrane. --------------------------------------------------------------------------Question 4 Refer to Activity 1. Which solute(s) passed through the 100 MWCO membrane? Correct: Na+ and urea --------------------------------------------------------------------------Question 5 Refer to Activity 1. Which solute demonstrated the highest diffusion rate through the 100 MWCO? Correct: Na+ --------------------------------------------------------------------------Question 6 Refer to Activity 2: Simulating Facilitated Diffusion.
Which solute(s) were able to travel against their concentration gradients? Correct: None could travel against their concentration gradient. --------------------------------------------------------------------------Question 7 Refer to Activity 2. One way that the rate of glucose transport could be increased is: Correct: Increase the concentration of glucose --------------------------------------------------------------------------Question 8 Refer to Activity 2. Which of the other solutes affected the rate of glucose diffusion? Correct: None of the solutes affected the diffusion rate of glucose. --------------------------------------------------------------------------Question 9 Refer to Activity 3: Simulating Osmotic Pressure. Under which type of transport process is osmosis included? Correct: Simple diffusion --------------------------------------------------------------------------Question 10 Refer to Activity 3. Which of the membranes excluded water movement through the membrane? Correct: None of the membranes affected water transport. --------------------------------------------------------------------------Question 11 Refer to Activity 3. When solute concentration is __________, then osmotic
pressure is __________. Correct: increased, increased --------------------------------------------------------------------------Question 12 Refer to Activity 4: Simulating Filtration. The simulated filtration membrane is representative of the filtration membrane of what structure in humans? Correct: Renal corpuscle --------------------------------------------------------------------------Question 13 Refer to Activity 4. What characteristic of a solute determines whether or not it passes through a filtration membrane? Correct: Molecular size --------------------------------------------------------------------------Question 14 Refer to Activity 5: Simulating Active Transport.
Which carrier proteins affect Na+ transport? Correct: None of the carrier proteins included in this active transport simulation affected Na+ transport. --------------------------------------------------------------------------Question 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. Correct: 3, 2 --------------------------------------------------------------------------Question 16 What characteristic(s) of the semipermeable membrane used in the simple diffusion and filtration experiments determines which substances pass through them? Correct: Molecular weight --------------------------------------------------------------------------Question 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? Correct: To the left beaker --------------------------------------------------------------------------Question 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? Correct: To the right beaker --------------------------------------------------------------------------Question 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? Correct: Osmosis --------------------------------------------------------------------------Question 20 What determines whether a transport process is passive or active? Correct: Presence of ATP