BIOLOGY
BIOLOGY
12th Edition
ISBN: 9781264839698
Author: Raven
Publisher: MCG CUSTOM
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Chapter 9, Problem 5A
Summary Introduction

Introduction:

Cell signaling involves three processes, namely reception, transduction and cellular response. The same signal molecule can produce different effects in different cells while different signal molecules can produce same effects in the different cells.

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All cells of a multicellular organism may not respond in the same wayto a particular ligand (signaling molecule) that binds to a cell surfacereceptor. The difference in response may be due toa. the type of receptor for the ligand that the cell expresses.b the affinity of the ligand for the receptor in a given cell type.c. the type of signal transduction pathways that the cell expresses.d. the type of target proteins that the cell expresses.e. all of the above.
Identify which of the following statements is a lie? Select one: a. The docking of ligands to the receptor causes receptor-associated proteins to activate another protein to continue the signaling cascade and one example of this event is the binding of epidermal growth factor (EGF) to the EGF receptor . b. Ligands are important to initiate signal Transduction pathway. c. Ligands detach from the cell surface receptor in order to change the conformation of the receptor and initiate the signaling pathway.
Paracrine signaling is characterized by ligands that are a. produced by the cell itself. b. secreted by neighboring cells. c. present on the plasma membrane of neighboring cells. d. secreted by distant cells.
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Intro to Cell Signaling; Author: Amoeba Sisters;https://www.youtube.com/watch?v=-dbRterutHY;License: Standard youtube license