Campbell Biology (11th Edition)
11th Edition
ISBN: 9780134093413
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Textbook Question
Chapter 7.2, Problem 2CC
VISUAL SKILLS Ø Examine Figure 7.2. Why is a transport protein needed to move many water molecules rapidly across a membrane?
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Model 4 - Transport Proteins: Facilitated Diffusion
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10. What appears to be the effect of inserting a protein channel into the membrane on the
movement of molecules across the membrane?
11. Is the inner surface (facing the channel) of the embedded protein likely to be polar or nonpolar
in the examples shown in Model 4? Is the exterior surface (facing the fatty acid chains of the
phospholipids) of the embedded protein likely to be polar or nonpolar? Explain your reasoning.
When a membrane protein assists in the passive transport of molecules across a barrier in the
direction down their concentration gradient (from high concentration to low concentration) it is
called facilitated diffusion. Transport proteins may also be involved in active transport where the
cell uses energy from…
Give detailed Solution with explanation needed *don't use Ai for answering this
Osmosis Practice Activity
Osmosis is the diffusion of water from an area of high concentration to an area of low concentration.
Only water moves in osmosis! The diagrams below show the concentration of water and salt inside
the cell and the concentration of water and salt surrounding the cell. Complete the sentences below
by comparing the concentration of the water inside the cell and the concentration outside the cell.
1.
a. Water will flow
the cell, out of the cell, in both directions).
(into
5% NaCl
95% H20
95% NaCI
5% H20
b. The cell will
(shrink,
burst, stay the same).
a. Water will flow
(into the cell.
2.
5% NaCl
out of the cell, in both directions).
5% NaCl
95% H20
95% H20
b. The cell will
(shrink, burst,
stay the same).
Chapter 7 Solutions
Campbell Biology (11th Edition)
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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- Determine the type of transport. Here are your options:Simple diffusion, facilitated diffusion, osmosis, primary activetransport, secondary active transport1. A hydrophobic molecule is moving through the membrane2. K+ moving against its gradient (low to high) through the sodiumpotassium pump3. Water moving through the cell membrane4. A solute moving down its gradient through a carrier proteinarrow_forwardOne of the curves below describes nonmediated diffusion, and the other describes facilitated transport. Which is which? Explain your choices. Concentration difference across membrane Rate of transport -arrow_forwardIdentify (state whether each item is an example of diffusion, osmosis, filtration, or active transport) 1. Movement of water from an area of lower impermeant solute concentration to an area of higher impermeant solute concentration. 2. Dye particles spread evenly through water. 3. Starch particles pass through a paper membrane. 4. A cell uses energy to "pump" sugar molecules from its external environment. 5. Water in cell moves out into a concentrated salt solution bathing the cell.arrow_forward
- The image below shows the movement of molecules across a plasma membrane. extracellular space lipid bilayer (cell membrane) TIMEI Source: LadyofHats small hydrophobic molecules intracellular space Using the image above, answer the following questions. (a) Identify the type of cell transport that is occurring in the image and justify your answer. (b) Explain the fluid mosaic model of the cell membrane as i relates to the movement of mole- cules illustrated in the figure. answer. (c) Predict the difference you would expect to see in the movement of illustrated molecules if they were to represent hydrophilic molecules rather than hydrophobic molecules. Justify yourarrow_forwardLAB EXERCISE 3A A. Cell Membranes. In the square provided, draw a double layer of phospholipids with a large protein embedded within it. Label the parts of this phospholipid bilayer that are partially charged (polar) and uncharged (non-polar). B. Anatomy of a Cell. Draw a "typical" cell in the space below (see lecture notes or the labeled/unlabeled Images on Canvas). Sketch the following organelles within the cell and label them. Plasma (Cell) Membrane Nucleus Ribosome Rough Endoplasmic Reticulum Smooth Endoplasmic Reticulum Golgi Apparatus Mitochondria Lysosome Cytoplasm Microvilli Cilia A region of exocytosisarrow_forwardThe distribution of water is determined by solute concentrations. A hypertonic solution would cause a body cell to shrink in size. Both statements are true. Both statements are false. The first statement is true and the second statement is false. The first statement is false and the second statement is true. Spaced practice question: Consider a membrane protein and its chemistry. Which of the following would describe a channel protein? It is an inorganic compound. It is an example of a globular (functional) protein. It is stable when exposed to an acidic environment. It is an example of a fibrous (structural) protein.arrow_forward
- TONICITY DRAGTHE WORDS INTO THE BLANK SPACES BELOW TO ACCURATELY COMPLETE THE PARAGRAPH decreases Hypertonic increases key: Hypotonic solute particle • cell membrane cell wall solute in all solutions, the solvent is H20 solvent A В Solution B is to solution A. This is because solution B has a greater concentration of in it than does solution A. Solution C has no solutes dissolved in it, therefore it is to both Solutions A and B. As the relative concentration of solutes in two solutions increases, of necessity the relative concentration of water in the same two solutions Solution A has a lower concentration of than does Solution C; Solution A is also hypertonic to Sol tion C.arrow_forwardBased on the Movement of Water across a Selectively Permeable Membrane lab, what is a selectively permeable membrane definition? allows small molecules like corn syrup to pass but does not let large water molecules pass allows large molecules like corn syrup to pass but does not let larger water molecules pass allows large proteins like corn syrup to pass but does not let large water molecules pass allows small molecules like water to pass but does not let larger molecules like corn syrup pass *What is throwing me off is the comparison or larger vs smaller moleculesarrow_forwardListen The mechanism of membrane transport may involve the following: 1) ATP hydrolysis. O2) Conformation change of membrane proteins. 3) Phosphorylation or dephosphorylation of membrane proteins. 4) ATP hydrolysis and conformation change of membrane proteins. 5) All of these are correct.arrow_forward
- 4 5 6arrow_forwardUnit 2: Cells Test Review Cell Transport Label the following pictures: active transport, passive osmosis, passive diffusion, or passive facilitated diffusion. We o Why does Active Transport require ATP energy? What is your vocabulary word that means balance/ equillibrlum? Solutions 1. Label the below images of solutions: hypertonic, hypOtonic, or isotonic. 2. Write if the cell will be at equilibrium, shrink, or swell. 3. Explain where the most water is (inside the cell or outside the cell). 4. Explain where most of the water will move (inside the cell or outside the cell). Water O Water Water Water o O Water Water O Solute O Solute O Solute Explain if water will fNow into or out of the cell in the following scenarios: 1. Salt is 30% inside the cell and 35% outside the cell. • Water is % inside the cell % outside the cell • Waler will flow [inside /outsidel so the cell can reach equilibrium.arrow_forward8. Define homeostasis. maintoining nterral balance 9. What role does the cell membrane play in maintaining homeostasis? 10. How is facilitated diffusion different from diffusion? How are they similar? 11. List two ways that active transport is different than passive transport. 1) 2) 12. Why is the sodium-potassium pump considered an active transport? Which direction are the sodium and potassium bing pumped? How many sodiums are being pumped? How many potassiums are being pumped?arrow_forward
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