EBK CAMPBELL BIOLOGY
10th Edition
ISBN: 9780136539414
Author: Reece
Publisher: VST
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Chapter 7.1, Problem 1CC
VISUAL SKILLS Ø Carbohydrates are attached to plasma membrane proteins in the ER (see Figure 7.9). On which side of the vesicle membrane are the carbohydrates during transport to the cell surface?
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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…
Transport Across the Cell Membrane Worksheet
1. For each of the following examples, state whether the solution is isotonic, hypertonic or
hypotonic and draw an arrow to indicate which way water will move.
a)
b)
100% H₂O
10% NaCl
0% NaCl
90% H₂O
83
5% salt
10% salt
Chapter 7 Solutions
EBK 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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- 8. 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_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_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_forward
- Membrane Physiology Homework 1. You have a beaker filled with a solution containing 2M glucose, 4M urea and IM salt. Suspended in the solution is a cell that containing a solution of IM glucose, 8M urea and 3M salt. The membrane of the cell is permeable to glucose and salt but not urea. Answer each of the following questions: a. Where will water move? b. Where will urea move? c. Where will glucose move? d. Where will salt move? e. What will happen to the volume of fluid inside the cell? f. What will happen to the osmolarity of the fluid inside the cell?arrow_forwardDetermine 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_forwardJ. What is the tonicity of the cell if the percentage of extracellular environment contains of '70% solute while the intracellular contains 34% solvent? Draw the solid arrows to indicate the net movement of the solutes into and/or out of the cell. Is the tonicity of the cell isotonic, hypertonic or hypotonic? ICF ECF 34% 70% What is the tonicity of the cell if its intracellular environment contains 50% solute and the extracellular contains 50% solvent? Show your solution. Draw the solid arrows to indicate the net movement of the solutes into amdor Gut ofhe coll. Is dhe tonicity ofthe coll isútonic, hyportonic ICF ECF 50% 50%arrow_forward
- Bulk transport- Differentiate Exocytosis and endocytosis. What are the three types of endocytosis?arrow_forwardMatch the transport mechanisms with their descriptions. (1) diffusion (2) facilitated diffusion (3) filtration (4) active transport (5) endocytosis (6) exocytosis A. the cell membrane engulfs a particle or substance, drawing it into the cell in a vesicleB. movement down the concentration gradient with a carrier protein, without energy inputC. movement down the concentration gradient without a carrier protein or energy inputD. a particle or substance leaves a cell in a vesicle that merges with the cell membraneE. movement against the concentration gradient with energy inputF. hydrostatic pressure forces substances through membranesarrow_forwardDescribe what gap junction are, emphasizing on how they are different two other cellular points of contact, their protein components and cellular function. Describe the three main sources of membrane fluidity. Describe in detail what proteoglycans are, including their hygroscopicity and biological roles.arrow_forward
- Match with correvt defenitionarrow_forwardB) Rate of transport into the cll A or B 10 20 30 40 Time (min) The graph directly above shows the rate of substance transport over time when the cells that do not contain the compounds A, B, or C, are placed in 1 mM solutions of A, B, and C, respectively. Based upon these data which of the following is/are compatible modes of transport for substance A? (active transport, facilitated diffusion, simple diffusion) For substance B? For substance C?arrow_forwardMacmillan Learning Integral membrane proteins have different characteristics and functions than peripheral membrane proteins. Identify the statements that are properties of integral membrane proteins and those that are properties of peripheral membrane proteins. Integral membrane proteins reach through all or part of the membrane act as tunnels through the cell membrane attach at the cell membrane surface Peripheral membrane proteins can move laterally (sideways) in the hydrophobic part of the membranearrow_forward
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