Campbell Biology In Focus, Loose-leaf Edition (3rd Edition)
3rd Edition
ISBN: 9780134895727
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky
Publisher: PEARSON
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Textbook Question
Chapter 5.6, Problem 2CC
When a signal transduction pathway involves a phosphorylation cascade, what turns off the cell’s response?
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A signal transduction pathway leads to the regulation of one or more cellular activities. What does that mean?
Explain in your own words step by step (as simpler as possible)
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Chapter 5 Solutions
Campbell Biology In Focus, Loose-leaf Edition (3rd Edition)
Ch. 5.1 - Plasma membrane proteins have carbohydrates...Ch. 5.1 - WHAT IF? How would the membrane lipid composition...Ch. 5.2 - What property allows O2 and CO2, to cross a lipid...Ch. 5.2 - Why is a transport protein needed to move many...Ch. 5.2 - MAKE CONNECTIONS Aquaporins exclude passage of...Ch. 5.3 - How do you think a cell performing cellular...Ch. 5.3 - WHAT IF? If a Paramecium caudatum cell swims from...Ch. 5.4 - Sodium-potassium pumps help nerve cells establish...Ch. 5.4 - Prob. 2CCCh. 5.4 - MAKE CONNECTIONS Review the characteristics of the...
Ch. 5.5 - As a cell grows, its plasma membrane expands. Does...Ch. 5.5 - Prob. 2CCCh. 5.5 - MAKE CONNECTIONS In Concept 4.7, you learned that...Ch. 5.6 - During an epinephrine-initiated signal in liver...Ch. 5.6 - When a signal transduction pathway involves a...Ch. 5.6 - WHAT IF? How can a target cells response to a...Ch. 5 - In what way do the membranes of a eukaryotic cell...Ch. 5 - Which of the following factors would tend to...Ch. 5 - Phosphorylation cascades involving a series of...Ch. 5 - Lipid-soluble signaling molecules, such as...Ch. 5 - Which of the following processes includes all the...Ch. 5 - Based on Figure 5.17.which of these experimental...Ch. 5 - Prob. 7TYUCh. 5 - SCIENCE, TECHNOLOGY, AND SOCIETY Extensive...Ch. 5 - FOCUS ON EVOLUTION Paramecium and other...Ch. 5 - FOCUS ON INTERACTIONS A human pancreatic cell...Ch. 5 - SYNTHESIZE YOUR KNOWLEDGE In the supermarket,...
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- How is an extracellular signal converted to an intracellular signal in signal transduction? Give a specific example.arrow_forwardDefine the term signal transduction?arrow_forwardThe structure of a plant cell wall needs to loosen to accommodate cell growth. What signaling molecule controls this process?arrow_forward
- Describe ways a cell might terminate a signal pathway.arrow_forwardWhat is the benefit of using second messengers and phosphorylation cascades during the transduction step of cell signaling?arrow_forwardHow is an extracellular signal converted to an intracellular signal in signal transduction? Give a specific example.arrow_forward
- Chemotaxis is a process by which cells migrate toward higher concentrations of a signaling molecule. The signaling molecule binds cell-surface receptors that result in actin polymerization at the cell membrane. Actin polymerization results in the formulation of filamentous actin that exerts a force and leads to protrusion of the leading edge. A researcher tested Compound A on chemotaxing cells and measured the relative amount of filamentous actin found in the cells at different times. Use the EGF Pathway passage to answer the questions. Part A Which of these structures, if present in a prokaryote, would prevent the organism from using this type of actin polymerization to chemotax toward a signal? A. cell wall B. flagellum C. mitochondrion D. ribosome Part B In the model proposed, which of these events MOST likely occurs to facilitate chemotaxis? A. Integrins anchor the cell to extracellular components. B. Motor proteins move actin toward the leading edge. C. Mitochondria migrate…arrow_forwardChemotaxis is a process by which cells migrate toward higher concentrations of a signaling molecule. The signaling molecule binds cell-surface receptors that result in actin polymerization at the cell membrane. Actin polymerization results in the formulation of filamentous actin that exerts a force and leads to protrusion of the leading edge. A researcher tested Compound A on chemotaxing cells and measured the relative amount of filamentous actin found in the cells at different times. Use the EGF Pathway passage to answer the questions. Part B In the model proposed, which of these events MOST likely occurs to facilitate chemotaxis? A. Integrins anchor the cell to extracellular components. B. Motor proteins move actin toward the leading edge. C. Mitochondria migrate away from the leading edge. D. Desmosomes anchor the cell to other cells. My answer to Part B is (b) motor proteins move actin toward the leading edge. But your answer is (d). Can you please explain why B…arrow_forwardIn terms of cell communication, compare and contrast the action of hydrophilic versus hydrophobic ligands (signaling molecules). What type of receptor is used by these ligands? How does each type of ligand influence cell activity?arrow_forward
- Describe phosphorylation relay in signalingarrow_forwardIn the regulation of enzyme activity by phosphorylation (as discussed in class), the introduction of phosphate to the enzyme being controlled: requires a protein phosphatase enzyme but not ATP requires a protein phosphatase enzyme plus ATP O requires a protein kinase enzyme but not ATP O requires a protein kinase enzyme plus ATParrow_forwardFor most signaling molecules, explain why a signal transduction pathway is necessaryarrow_forward
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