Bio 121 Campbell Biology Truman College
17th Edition
ISBN: 9781323670637
Author: Urry, Cain
Publisher: PEARSON
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Chapter 7.4, Problem 2CC
VISUAL SKILLS Ø Compare the sodium-potassium pump in Figure 7.15 with the cotransporter in Figure 7.18. Explain why the sodium-potassium pump would not be considered a cotransporter.
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A new 850 cm^2 membrane is being tested for use in a hemodialysis device. During testing, a model fluid mixture is used that contains solutes with average radii of 1 nm. In one test, the concentration of the filtrate is found to be 2.17 g/L, while the concentration on the feed-side surface is 8.52 g/L.
Prior experimentation showed that the mass transfer coefficient in the device was approximately 9 × 10-4 cm/s.
A) If the total filtration flow rate is measured to be 0.56 cm^3/s, what is the solute concentration in the feed solution?
B) Explain how you could determine the average membrane pore radius for this membrane using this information.
Chapter 7 Solutions
Bio 121 Campbell Biology Truman College
Ch. 7.1 - VISUAL SKILLS Carbohydrates are attached to...Ch. 7.1 - WHAT IF? How would the membrane lipid composition...Ch. 7.2 - What property allows O2 and CO2 to cross a lipid...Ch. 7.2 - VISUAL SKILLS Examine Figure 7.2. Why is a...Ch. 7.2 - MAKE CONNECTIONS Aquaporins exclude passage of...Ch. 7.3 - How do you think a cell performing cellular...Ch. 7.3 - WHAT IF? If a Paramecium swims from a hypotonic...Ch. 7.4 - Sodium-potassium pumps help nerve cells establish...Ch. 7.4 - VISUAL SKILLS Compare the sodium-potassium pump...Ch. 7.4 - MAKE CONNECTIONS Review the characteristics of...
Ch. 7.5 - As a cell grows, its plasma membrane expands. Does...Ch. 7.5 - DRAW IT Return to Figure 7.9, and circle a patch...Ch. 7.5 - Prob. 3CCCh. 7 - In what ways are membranes crucial to life?Ch. 7 - How do aquaporins affect the permeability of a...Ch. 7 - What happens to a cell placed in a hypertonic...Ch. 7 - ATP is not directly involved in the functioning of...Ch. 7 - Which type of endocytosis involves the binding of...Ch. 7 - In what way do the membranes of a eukaryotic Cell...Ch. 7 - According to the fluid mosaic model of membrane...Ch. 7 - Which of the following factors would tend to...Ch. 7 - Which of the following processes includes all the...Ch. 7 - Prob. 5TYUCh. 7 - DRAW IT An artificial "cell" consisting of an...Ch. 7 - EVOLUTION CONNECTION Paramecium and other...Ch. 7 - Prob. 8TYUCh. 7 - SCIENCE, TECHNOLOGY, AND SOCIETY Extensive...Ch. 7 - WRITE ABOUT A THEME: INTERACTIONS A human...Ch. 7 - SYNTHESIZE YOUR KNOWLEDGE In the supermarket,...
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- 2. (a) Define concentration polarization and polarization modulus. How is polarization modulus mathematically related to filtration flux? (b) If bacterial cell debris has G t = 54 x 106 sec, what centrifuge speed is needed to effect a full sedimentation in two hours? (centrifuge having bowl diameter of 10 cm)arrow_forwardWhen testing the tonicity of potato strips, why is the amount of wait time after adding the potato strip an important factor in the experiment a)the lower the concentration of solute in the solution more time is required for osmosis to occcur. b) the potato immediately absorbs water. the higher the concentration of solute in the solutiokn more tomes is required for osomis to occur d) the potato will spoil so you have to work quicklyarrow_forwardinformation in table 4.1 onlyarrow_forward
- Im guessing you not the same person that looked into my exercise at first. Does that mean the experts first results was incorrect and the right result is my teachers and yours? I understand almost everything you explained, thank you. The only thing I dont understand is that how can Km be 6mM? 6mM is the substrate concentration given in part a). How can this become kmarrow_forwardList and explain the four functions of the basic components in a flow cytometer? How is a FACS machine different? Please give an example of how a flow cytometer or FACS can be used to identify two different cell populations.arrow_forwardFor a gradient system with a gradient of 5-90% in 50 min, flow 2 mL/min, column 100 x 4.6 mm i.d., the first peak elutes at 20 min, and the last peak elutes at 50 min. Calculate k* for this system. 2. Can isocratic elution be used for this sample? If so, what is the range of k values to be expected. 3.Propose a way to shorten the gradient run time by eliminating the wait for the first peak to elute at 20 min. 4. For the original conditions of this question, change the conditions necessary to use a 150 x 4.6 mm column while maintaining the same k* value.arrow_forward
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