Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Textbook Question
Chapter 5, Problem 6TYU
Test Your Understanding
6.
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1. Where is the cell membrane located?
2. What is the function of the cell membrane?
3. What does selectively permeable mean?
4. What is the difference between active and passive transport?
Check your understanding about the following statements:I. Large cells have more surface area relative to cell volume than small cells. II. As cell increases in size, the surface/volume ratio increases.
a. The first statement is true. The second statement is false.
b. The first statement is false. The second statement is true
c. Both statements are true
d. Both statements are false.
MAKE CONNECTIONS Explain why the set of forces driving ionmovement across the plasma membrane of a cell is described as anelectrochemical (electrical and chemical) gradient (see Concept 7.4).
Chapter 5 Solutions
Biology (MindTap Course List)
Ch. 5.1 - Prob. 1LOCh. 5.1 - Prob. 2LOCh. 5.1 - Prob. 3LOCh. 5.1 - Prob. 4LOCh. 5.1 - What molecules are responsible for the physical...Ch. 5.1 - Prob. 2CCh. 5.1 - Prob. 3CCh. 5.2 - Prob. 5LOCh. 5.2 - Prob. 1CCh. 5.2 - What roles do membrane proteins play in cell...
Ch. 5.3 - Describe the importance of selectively permeable...Ch. 5.3 - Prob. 1CCh. 5.3 - Prob. 2CCh. 5.3 - Prob. 3CCh. 5.4 - Prob. 7LOCh. 5.4 - LEARNING O9BJECTIVES 8Define osmosis and solve...Ch. 5.4 - PREDICT What would happen if a plan cell were...Ch. 5.4 - What is the immediate source of energy for simple...Ch. 5.4 - Prob. 3CCh. 5.5 - Prob. 9LOCh. 5.5 - Prob. 1CCh. 5.5 - What is the immediate energy source for...Ch. 5.6 - Prob. 10LOCh. 5.6 - In what ways are exocytosis and endocytosis...Ch. 5.6 - How are the processes of phagocytosis and...Ch. 5.6 - What is the sequence of events in...Ch. 5.7 - Compare the structures and functions of anchoring...Ch. 5.7 - Prob. 1CCh. 5.7 - Prob. 2CCh. 5 - Test Your Understanding 1.Transmembrane proteins...Ch. 5 - Test Your Understanding 2.Which of the following...Ch. 5 - Test Your Understanding 3.ABC transporters (a) use...Ch. 5 - Test Your Understanding 4.When plant cells are in...Ch. 5 - Test Your Understanding 5.Which of the following...Ch. 5 - Test Your Understanding 6.Electrochemical...Ch. 5 - Test Your Understanding 7.In cotransport (indirect...Ch. 5 - Prob. 8TYUCh. 5 - Prob. 9TYUCh. 5 - Test Your Understanding 10.INTERPRET DATA GLUT 4...Ch. 5 - Prob. 11TYUCh. 5 - Test Your Understanding 12.EVOLUTION LINK Explain...Ch. 5 - Prob. 13TYU
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Test Your Understanding 5.Which of the following processes requires the cell to expend metabolic energy directly (e.g., from ATP)? (a) osmosis (b) facilitated diffusion (c) all forms of carrier-mediated transport (d) active transport (d) active transport (e) simple diffusion
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Test Your Understanding 7.In cotransport (indirect active transport) (a) a uniporter moves a solute across a membrane against its concentration gradient (b) the move of one solute down its concentration gradient provides energy for transport of some other solute up its concentration gradient (c) a channel protein moves ions by facilitated diffusion (d) osmosis powers the movement of ions against their concentration gradient (e) sodium is directly transported in one direction, and potassium is indirectly transported in the same direction
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Test Your Understanding 1.Transmembrane proteins (a) are peripheral proteins (b) receptor proteins (c) extend completely through the membrane (d) extend along the surface of the membrane (e) are secreted from the cell
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Test Your Understanding 4. Diffusion is an (a) endergonic process because free energy increases (b) endergonic process because free energy decreases (c) exergonic process because entropy increases (d) exergonic process because entropy decreases (e) more than one of the preceding options are true
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Test Your Understanding 3.ABC transporters (a) use the energy of ATP hydrolysis to transport certain ions and sugars (b) are important in facilitated diffusion of certain ions (c) are a small group of channel proteins (d) are found mainly in plant cell membranes
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Test Your Understanding 10.INTERPRET DATA GLUT 4 is a glucose transporter that functions in adipose (fat) cell plasma membranes. An analysis of adipose cells exposed to insulin showed that a single cell could import glucose at a maximum rate of about 1108 molecules/second. Under the same conditions, unstimulated cells could only transport a maximum of about 1107 molecules/second. What does this finding tell you about the relative number of GLUT 4 transporters functioning in the plasma membranes of stimulated versus unstimulated cells?
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What would happen to an animal cell if you immersed it in a hypertonic solution for an extended period of time?
Question options:
Excess water is taken up by the central vacuole, causing the cell to swell, but not burst.
The cell would shrivel and appear crenate.
Nothing would happen, the system is in equilibrium.
The cell would swell until it burst.
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WHAT IF? If the plant cell wall or the animal extracellular matrix were impermeable, what effect would thishave on cell function?
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EXPERIMENT : CRYOPRESERVATION OF CULTURED CELL LINES
Questions
What are differences between adherent and suspension cells.
After 3 days of cryopreservation, the cell morphology was observed under the microscope.The total cell concentration is reduced into half of the number after cryopreservation. What are reasons for decreasing in cell concentration.Justify your answer.
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Test Your Understanding 4.When plant cells are in a hypotonic medium, they (a) undergo plasmolysis (b) build up turgor pressure (c) wilt (d) decrease pinocytosis (e) lose water to the environment
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Test Your Understanding 10. PREDICT The intercellular substance of the connective tissue in a dogs skin is decreasing due to a rare disease. What effect might this change have on the dogs body?
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1) Draw a model of the plasma membrane to form a cell. Include a tube embedded in the membrane. Show 2 water molecules inside the cell and 12 water molecules outside the cell. Indicate which way the water will move through the aquaporin with an arrow.
a) Using your knowledge of membrane transport, which direction will the water molecules move through the aquaporin? Why?
b) Why would water have a difficult time crossing the cell membrane? Keep in mind the structure of water in your answer.
2) Develop an explanation for the necessity of having kinks in the hydrophobic tail of the phospholipids that make up cell membranes.
a) Develop an explanation for the necessity of having kinks in the hydrophobic tail of the phospholipids that make up cell membranes.
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The Cell Membrane; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=AsffT7XIXbA;License: Standard youtube license