Campbell Biology in Focus
3rd Edition
ISBN: 9780134710679
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Rebecca Orr
Publisher: PEARSON
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Textbook Question
Chapter 5.6, Problem 1CC
During an epinephrine-initiated signal in liver cells, in which of the three stages of cell signaling does glycogen phosphorylase act?
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in the insulin signaling pathway, the function of the PIP3-dependent Protein Kinase-1 is to add a __ group to the enzyme __ , which activates that enzyme.
In the liver and muscle cells, epinephrine stimulates the release of glucose from glycogen by inhibiting glycogen synthesis and stimulating glycogen breakdown. Outline the signaling events that occur after epinephrine binds to its receptor and the resultant increase in the concentration of intracellular cAMP and release of glucose.
Given what we know about epinephrine and glucose 6-phosphate dehydrogenase, would you predict that glucose 6-dehydrogenase is activated, inhibited, or unaffected by epinephrine induced cell signaling? Explain your prediction.
Chapter 5 Solutions
Campbell Biology in Focus
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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- A hormone molecule binds to a receptor on a cell membrane. It doesnt enter the cell; rather, the binding activates a second messenger inside the cell that triggers an amplified response to the hormonal signal. Is the signaling molecule a steroid or a nonsteroid hormone?arrow_forwardWhat distinguishes a steroid receptor from a receptor tyrosine kinase receptor or a G-protein-coupled receptor?arrow_forwardWhich signaling molecule or molecules bind to a G-protein coupled receptor? (note: there may or may not be more then one answer) a) cortisol b) insulin c) glucagon d) calcium e) cyclic AMP f) epinephrinearrow_forward
- What kind of protein is the reactor in insulin signaling pathway: a ligand-gated channel, a G protein-linked receptor, or an enzyme- linked receptor? The receptor activates a specific kind of protein, Based on what that protein does, what is it called?arrow_forwardWhat are the three main parts of a signaling pathway? Give a detailed specific example, such as how epinephrine signals for rapid digestion of glycogen in liver cells.arrow_forwardHow would a mutation in ras that leads to formation of a Ras proteinwith no GTPase activity affect a cell’s response to insulin?arrow_forward
- Identify molecule (1) in the pathway of hormonal regulation illustrated below: (A) ion channel (B) G protein-coupled receptor (C) tyrosine kinase receptor (D) cytoplasmic/nuclear receptorarrow_forwardCan you please describe the role of G proteins in ligand-activated cellular signal transduction.arrow_forwardWhy do peptide and steroid hormones bind different kinds of receptor, and how does this difference affect the resulting signaling pathways in the target cell?arrow_forward
- In liver and muscle, epinephrine stimulation of the cAMP pathway activates glycogen breakdown and inhibits glycogen synthesis, whereas in adipose tissue, epinephrine activates hydrolysis of triglycerides, and in other cells, it causes a diversity of other responses. What step in the cAMP signaling pathways in these cells specifies the cell response?arrow_forward. If a cell has an excess of a subunits, what is likely to happen to signaling pathways that act through Gbg complexes?arrow_forwardThis is a signaling pathway that involves a second messenger: epinephrine → G protein-coupled receptor → G protein → adenylyl cyclase → cAMP. Which one is known as the second messenger?arrow_forward
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