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Hormone

Chapter 11 Cell Communication

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Lecture Outline for Campbell/Reece Biology, 7th Edition, ? Pearson Education, Inc. 11-1 Chapter 11 Cell Communication Lecture Outline Overview: The Cellular Internet ? Cell-to-cell communication is absolutely essential for multicellular organisms. ? Cells must communicate to coordinate their activities. ? Communication between cells is also important for many unicellular organisms. ? Biologists have discovered universal mechanisms of cellular regulation involving the same small set of cell-signaling mechanisms. ? The ubiquity of these mechanisms provides additional evidence for the evolutionary relatedness of all life. ? Cells most often communicate by chemical signals, although signals may take other forms.

Body Systems

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The Nervous System Function: The function of the nervous system is to control and coordinate functions throughout the body and respond to external and internal stimuli. The nervous system is divided into 2 parts the PNS (peripheral nervous system) and the CNS (central nervous system), and is in control of both. Nerve signals are transmitted through these systems. Interdependence: The nervous system relies on the muscular system to work properly. Organism Comparison: A flatworm?s nervous system is simpler compared to humans. It has nerve cords that control its actions. The Skeletal System

cell commun

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Signal Transduction Mechanisms Chemical Messengers and Receptors Cell Signals What kinds of environmental factors do cells respond to? 2 Chemical Signals What is the difference between hormones and parcrine factors? 3 Signal Transduction What elements are involved in cell signaling? 4 Signal Transduction What is the difference between a hydrophilic and a hydrophobic messenger? What kinds of substances fall into each of these categories? 5 Signal Transduction What is true about the attachment between ligand and receptor? What is meant by receptor affinity? What is Kd? 6 Signal Transduction What is meant by receptor down regulation? Why is a knowledge of receptor function so important? 7 G Protein-Linked Receptors What is a G protein?

Campbell Biology Chapter 1 outline

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CHAPTER 1 *** January 9th, 2013 2 BIOLOGY IS? Life is made of: The properties of Life: Order Evolutionary adaptation Response to the environment Reproduction Growth & Development Energy processing Regulation EVOLUTION: THE PROCESS OF CHANGE THAT HAS TRANSFORMED LIFE ON EARTH Fossils Prove Evolution Darwin?s Origin of Species (1859) ?Decent with Modification? Descent with modification refers to the passing on of traits from parent organisms to their offspring. This passing on of traits is known as heredity, and the basic unit of heredity is the gene. History of Human Evolution Natural Selection

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