CAMPBELL BIOLOGY >CUSTOM<
14th Edition
ISBN: 9781269868235
Author: Reece
Publisher: PEARSON C
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Textbook Question
Chapter 7.3, Problem 2CC
WHAT IF? Ø If a Paramecium swims from a hypotonic to an isotonic environment, will its contractile vacuole become more active or less? Why?
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WHAT IF? Some membrane proteins diffuse faster in the plasma membrane when the cytoskeleton or the extracellular matrix is artificially removed than when cells are unperturbed. Explain why.
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Chapter 7 Solutions
CAMPBELL BIOLOGY >CUSTOM<
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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- . WHAT IF? Suppose a cell’s membrane potential shiftsfrom -70 mV to -50 mV. What changes in the cell’spermeability to K+or Na+could cause such a shift?arrow_forwardQ1: What would the second diagram look like if the pores in the semipermeable membrane were too small to allow water molecules to pass through? Q2: What would the second diagram look like if the pores were large enough to let both water molecules and sugar molecules through? Q3: The fluid in an IV bag is isotonic to blood. What change would you see in the red blood cells of a patient if a bag of a hypertonic solution was used in error?arrow_forwardWHAT IF? Suppose a membrane surrounded an oildroplet, as it does in the cells of plant seeds and in someanimal cells. Describe and explain the form it might takearrow_forward
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- According to ‘Contriving Decent Demonstrations’ section of Vogel (1994), what is the connection between molecular diffusion at the level of the cell and multicellular complexity at the level of the organism?(Please according to Vogel (1994)) in 2 to 3 sentencesarrow_forward1. in what direction water flows by osmosis through a semipermeable membrane when placed in a hypotonic solution, isotonic, or hypertonic environment? 2. Animal Cells burst or lyse in an environment?arrow_forwardQuestion:- Distinguish between two possible import mechanisms: biased diffusion and force‐generating motors.arrow_forward
- Q1: In what ways is the plasma membrane a barrier, and in what ways is it a gatekeeper? Q2: Why can’t ions (such as Na+) cross the plasma membrane without the help of a transport protein? Q3: If no energy were available to the cell, what forms of transport would not be able to occur? What forms of transport could occur?arrow_forwardQ41: Can you answer all the parts to this question A: Regarding jellyfish swimming, the recovery stroke of the jellyfish swimmimg mechanism, the medusa is returned to its resting state by B: Regarding substance transport, why must diffusion distances be kept short?arrow_forwardQ1: If endocytosis itself is nonspecific, how does receptor-mediated endocytosis bring only certain molecules into a cell? Q2: What sorts of molecules could be moved by endocytosis or exocytosis, but not by diffusion? Q3: How does the fluid that enters a cell via pinocytosis differ from the fluid that enters by osmosis?arrow_forward
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