Campbell Biology
3rd Edition
ISBN: 9781269937832
Author: Reece, Urry, Cain, Wasserman, Minorsky, Jackson
Publisher: Pearson Custom Publishing
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Textbook Question
Chapter 7, Problem 7.4CR
ATP is not directly involved in the functioning of a cotransporter. Why, then, is cotransport considered active transport?
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In the Sodium/Potassium pump, how is ATP used in the process of Active Transport? What is the goal and purpose of the Sodium/Potassium pump?
Why is ATP required for active transport?
"Transport by transporters can be either active or passive, whereas transport by channels is always passive" is true or false.
Chapter 7 Solutions
Campbell Biology
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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- List the means of unassisted membrane transport.arrow_forwardWhat is the importance of the concentration gradient in passive transport?arrow_forwardthe sodium channel exchanger NCX transports sodium into and calcium out of cardiac muscle cells. Describe why this itransporter is classified as secondary active transport?arrow_forward
- What might determine the value for the maximal flux of a mediated transport?arrow_forwardA red blood cell will swell and undergo hemolysis when placed in a hypotonic solution. Why this happens considering the principles of osmosis?arrow_forward"Transporters saturate at high concentrations of the transported molecule when all their binding sites are occupied; channels, on the other hand, do not bind the ions they transport and thus the flux of ions through a channel does not saturate." is true or false.arrow_forward
- What are the distinctions between facilitated difussion, primary active transport and secondary active transport?arrow_forwardWhat is the difference between active transport and passive transport?arrow_forwardIn primary/direct active transport, does ATP always have to be involved? Definitions seem to say the movement must be coupled with an exergonic reaction. Wouldn't the movement of a solute down its concentration gradient be exergonic, or is this an incorrect statement?arrow_forward
- Describe the direction in which sodium ions and a solute transported by secondary active transport move during cotransport and countertransport?arrow_forwardIs the H+/sucrose cotransport system involved in passive or active transport? How do you know?arrow_forwardWhat type of transport is shown?arrow_forward
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