What is true of cell signaling? Extracellular signals transduced by receptors always alter cell behavior and gene expression very quickly Some cells require cell signals just to survive Cell signals can be interpreted differently by different cells some cells require cell signals just to survive and cell signals can be interpreted differently by different cells All of the above

What is true of cell signaling? Extracellular signals transduced by receptors always alter cell behavior and gene expression very quickly Some cells require cell signals just to survive Cell signals can be interpreted differently by different cells some cells require cell signals just to survive and cell signals can be interpreted differently by different cells All of the above

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter6: Cell Communication

Section: Chapter Questions

Problem 1TYU: During signal transduction (a) the cell converts an extracellular signal into an intracellular...

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Usmotic Which of the following is associated with intracellular nuclear receptors? O Transcription factors Signal transduction Transcription factors and signal transduction O O None of the above Back Next Clear form
Non-canonical Hedgehog signaling results in actin cytoskeleton rearrangements, leading to cellmovement and changes in cell shape. Describe how changes to the actin cytoskeleton lead to cellmovement and changes in cell shape.You do not need to draw out the signaling pathway again (#1b). Your answer should focus onthe changes to the actin cytoskeleton. Drawings will be helpful!
27) Fill in the blanks Cells adjacent to one another frequently communicate through Other forms of cell-cell communication through In extracellular signaling ligand-receptor interaction induce; 28) Cell-to-cell communication by extracellular signaling usually involves six steps , sort the below given steps according to happening order; Removal of the signal, which usually terminates the cellular response – degradation of ligand- A change in cellular metabolism, function, or development CELLULAR RESPONSE triggered by the receptor-ligand complex – specific to the ligand-receptor complex Release of the signaling molecule by the signaling cell Transport of the signal to the target cell Synthesis of the signaling molecule by the signaling cell Detection of the signal by a specific receptor protein (receptor-ligand specificity 29) Polyethylene can be obtained in two different forms. High-density polyethylene (0.94 g/cm3) is a linear polymer. Low-density polyethylene (0.92 g/cm3) is a…
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Which of the following would not inhibit signal transduction? a. Phosphate groups are removed from proteins. b. Endocytosis acts on receptors and their bound signals. c. Receptors and signaling molecules separate. d. Receptors and bound signaling molecules enter lysosomes. e. Autophosphorylation targets the cytoplasmic portion of the receptor.
Figure 9.8 HER2 is a receptor tyrosine kinase. In 30 percent of human breast cancers, HER2 is permanently activated, resulting in unregulated cell division. Lapatinib, a drug used to treat breast cancer, inhibits HER2 receptor tyrosine kinase autophosphorylation (the process by which the receptor adds phosphates onto itself), thus reducing tumor growth by 50 percent. Besides autophosphorylation, which of the following steps would be inhibited by Lapatinib? Signaling molecule binding, dimerization, and the downstream cellular response. Dimerization, and the downstream cellular response. The downstream cellular response. Phosphatase activity, dimerization, and the downsteam cellular response.
During signal transduction (a) the cell converts an extracellular signal into an intracellular signal that leads to a change in some cell process (b) a signaling molecule directly activates or represses several genes (c) each enzyme catalyzes production of one molecule of product (d) enzymes in the signal cascade remain active until the last component of the pathway alters a cellular process (e) the signal is terminated by cyclic AMP
Which of the following mechanism will be activated if there is a shortage of cellular and endoplasmic reticulum Ca2+ reserve? O DAG will activate protein kinase C to release calcium bound to calmodulin ER membrane protein STIM1 will activate plasma membrane Orail channel All of the other mechanisms will be activated IP3 signaling will release stored calcium from the ER DAG will activate protein kinase C to activate store operated calcium channel in the plasma membrane < Previous Next ▸
What is the main benefit of cell signaling over long distances (ex: signaling via hormone secretion into the bloodstream)?
The basic elements or molecules of cell signaling I. second messengers - substances that enhances or inhibits activities of other proteins II. effectors - are usually enzymes that catalyzes formation of the second messenger III. receptors - cell membrane transmembrane proteins that interacts with ligands outside the cell IV. first messengers - usually are ligands outside the cell and interacts with transmembrane protein receptors I, III, IV only II, III, IV only I, II, III, IV I, II, III only