BIOLOGY 12TH ED (LL) W/ CONNECT
BIOLOGY 12TH ED (LL) W/ CONNECT
12th Edition
ISBN: 9781264898091
Author: Raven
Publisher: MCG
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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.
A small number of cell surface receptors and low amounts of signals (ligands) can generate a large intracellular response as each step of the signal transduction pathway can be expanded by... A. gene amplification, i.e. increasing the number of target genes. B.  enzyme-mediated signal amplification, e.g. phosphorylation cascades. C.  the synthesis of new proteins. D.  ATP Synthase, e.g. by building proton (H+) gradients.
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Intro to Cell Signaling; Author: Amoeba Sisters;https://www.youtube.com/watch?v=-dbRterutHY;License: Standard youtube license