Question 1

Red blood cells were placed in a solution of 1.2 % NaCl. W e should expect

Accepted Answer

A)  The rbcs swell because this solution is hypertonic 
B)  The rbcs swell because this solution is hypotonic 
C)  The rbcs shrink because this solution is hypertonic 
D)  The rbcs shrink because this solution is hypotonic 
E)  The rbcs neither shrink nor swell because this solution is isotonic 
A)  The rbcs swell because this solution is hypertonic 
B)  The rbcs swell because this solution is hypotonic 
C)  The rbcs shrink because this solution is hypertonic 
D)  The rbcs shrink because this solution is hypotonic 
E)  The rbcs neither shrink nor swell because this solution is isotonic C

Question 2

Doubling the viscosity of a fluid that is pressure- driven across a microporous membrane should

Accepted Answer

A)  Double the flow 
B)  Increase the flow to 16X its previous value 
C)  Halve the flow 
D)  Have little effect on the flow 
E)  Decre ase the flow by a factor of 4 
A)  Double the flow 
B)  Increase the flow to 16X its previous value 
C)  Halve the flow 
D)  Have little effect on the flow 
E)  Decre ase the flow by a factor of 4 C

Question 3

Red blood cells were placed in a solution of 3% glucose. W e should expect

Accepted Answer

A)  The rbcs swell because this solution is hypertonic 
B)  The rbcs swell because this solution is hypotonic 
C)  The rbcs shrink because this solution is hypertonic 
D)  The rbcs shrink because this solution is hypotonic 
E)  The rbcs neither shrink nor swell because this solution is isotonic 
A)  The rbcs swell because this solution is hypertonic 
B)  The rbcs swell because this solution is hypotonic 
C)  The rbcs shrink because this solution is hypertonic 
D)  The rbcs shrink because this solution is hypotonic 
E)  The rbcs neither shrink nor swell because this solution is isotonic B

Question 4

The best predictor of the osmotic pressure is

Accepted Answer

A)  Solute solubility 
B)  Concentration of solute 
C)  Concentration of water in a solution 
D)  Vapor pressure depression 
E)  The reflection coefficient 
A)  Solute solubility 
B)  Concentration of solute 
C)  Concentration of water in a solution 
D)  Vapor pressure depression 
E)  The reflection coefficient

Question 5

Consider a microporous membrane that separates a solution on the left with concentration CL from a solutio n on the righ t at C R. The permeability for the solute, p > 0. If CL > C R, the presence of pressure-driven flow from right to left should

Accepted Answer

A)  Increase the net flux of solute from left to right by solvent drag. 
B)  Increase the net flux of solute from right to left by solvent drag. 
C)  Decrease the net flux of solute from left to right by solvent drag. 
D)  Decrease the net flux of solute from right to left by solvent drag. 
E)  Not affect net flux of solute from left to right. 
A)  Increase the net flux of solute from left to right by solvent drag. 
B)  Increase the net flux of solute from right to left by solvent drag. 
C)  Decrease the net flux of solute from left to right by solvent drag. 
D)  Decrease the net flux of solute from right to left by solvent drag. 
E)  Not affect net flux of solute from left to right.

Question 6

Van't Hoff's limiting law for osmotic pressure is 6 P - o6w

Accepted Answer

A)  JV = Lp ($\Delta$P- $\sigma$$\Delta$$\pi$) 
B)  $\pi$ = RT ln C 
C)  $\pi$ =$\phi$ RT ln C 
D)  $\pi$= RT C 
E)  Lp = $\pi$ a4 / 8$\eta$ð 
A)  JV = Lp ($\Delta$P- $\sigma$$\Delta$$\pi$) 
B)  $\pi$ = RT ln C 
C)  $\pi$ =$\phi$ RT ln C 
D)  $\pi$= RT C 
E)  Lp = $\pi$ a4 / 8$\eta$ð

Question 7

Doubling the thickness of a microporous membrane should have what effect on pressure-driven flow across it?

Accepted Answer

A)  Reduce flow to 1/2 of its previous value 
B)  Reduce flow to 1/4 of its previous value 
C)  Increase flow to 2X its previous value 
D)  Increase flow to 4X its previous value 
E)  Increase flow to 8X its previous value 
A)  Reduce flow to 1/2 of its previous value 
B)  Reduce flow to 1/4 of its previous value 
C)  Increase flow to 2X its previous value 
D)  Increase flow to 4X its previous value 
E)  Increase flow to 8X its previous value

Question 8

Doubling the radius of the pores in a microporous mem brane should affect pressure-driven flow by

Accepted Answer

A)  Increasing it to 2X its previous value 
B)  Increasing it to 4X its previous value 
C)  Increasing it to 8X its previous value 
D)  Increasing it to16X its previous value 
E)  Increasing it to 32X its previous value 
A)  Increasing it to 2X its previous value 
B)  Increasing it to 4X its previous value 
C)  Increasing it to 8X its previous value 
D)  Increasing it to16X its previous value 
E)  Increasing it to 32X its previous value

Question 9

The coefficient that corects the observed osmotic pressure for an imperfectly semi-permeable membrane is

Accepted Answer

A)  $\phi$ 
B)  $\sigma$ 
C)  Lp 
D)  p 
E)  Lp $\sigma$ 
A)  $\phi$ 
B)  $\sigma$ 
C)  Lp 
D)  p 
E)  Lp $\sigma$

Question 10

The reflection coefficient

Accepted Answer

A)  Depends on the shape and size of the solute 
B)  Depends on the number of pores in the membrane 
C)  Depends on the shape and size of the pores in the membrane 
D)  Determines the flow produced by a given hydrostatic pressure 
E)  Both A and C are correct 
A)  Depends on the shape and size of the solute 
B)  Depends on the number of pores in the membrane 
C)  Depends on the shape and size of the pores in the membrane 
D)  Determines the flow produced by a given hydrostatic pressure 
E)  Both A and C are correct

Question 11

An approximate equation for the pressure-driven volume flow across a microporous membrane with
n pores per unit area is
w a2 / yð 6 P

Accepted Answer

A)  Q V = n$\pi$a2/ $\eta$ð$\Delta$P 
B)  QV = A n$\pi$a4 / 8$\eta$ð$\Delta$P 
C)  Q V = - AD ( $\Delta$ P - o$\delta$$\pi$)/ð 
D)  Q V = n $\pi$ a4 / 8$\eta$ð $\Delta$P 
E)  None of the above 
A)  Q V = n$\pi$a2/ $\eta$ð$\Delta$P 
B)  QV = A n$\pi$a4 / 8$\eta$ð$\Delta$P 
C)  Q V = - AD ( $\Delta$ P - o$\delta$$\pi$)/ð 
D)  Q V = n $\pi$ a4 / 8$\eta$ð $\Delta$P 
E)  None of the above

Exam 12: Osmosis and Osmotic Pressure

Red blood cells were placed in a solution of 1.2 % NaCl. W e should expect

Doubling the viscosity of a fluid that is pressure- driven across a microporous membrane should

Red blood cells were placed in a solution of 3% glucose. W e should expect

The best predictor of the osmotic pressure is

Consider a microporous membrane that separates a solution on the left with concentration CL from a solutio n on the righ t at C R. The permeability for the solute, p > 0. If CL > C R, the presence of pressure-driven flow from right to left should

Van't Hoff's limiting law for osmotic pressure is 6 P - o6w

Doubling the thickness of a microporous membrane should have what effect on pressure-driven flow across it?

Doubling the radius of the pores in a microporous mem brane should affect pressure-driven flow by

The coefficient that corects the observed osmotic pressure for an imperfectly semi-permeable membrane is

The reflection coefficient

An approximate equation for the pressure-driven volume flow across a microporous membrane with n pores per unit area is w a2 / yð 6 P

Physical Foundations Ii: Electrical Force Potential Capacitance and Current

Chemical Foundations I: Chemical Energy and Intermolecular Forces

Chemical Foundations Ii: Concentration and Kinetics

Diffusion

Electrochemical Potential and Free Energy

Cell Structure

Dna and Protein Synthesis

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Passive Transport and Facilitated Diffusion

Active Transport: Pumps and Exchangers

Cell Signaling

ATP Production I: Glycolysis

Atp Production Ii: Tca Cycle and Oxidative Phosphorylation

Atp Production Iii: Fatty Acid Oxidation and Amino Acid Oxidation

Origin of the Membrane Potential

The Action Potential

Propagation of the Action Potential

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Contractile Mechanisms in Skeletal Muscle

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Organization of the Nervous System

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the Chemical Senses

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Calcium and Phosphorus Homeostasis Ii

Female Reproductive Physiology

Consider a microporous membrane that separates a solution on the left with concentration CL from a solutio n on the righ t at C_R. The permeability for the solute, p > 0. If C_L > C _R, the presence of pressure-driven flow from right to left should