Cell surface receptor

Peripheral membrane proteins

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Cell membrane

Biological membrane

Adenosine triphosphate

Integral membrane proteins

Lipid raft

Chapter 5 Membrane Transport and Cell Signaling Fluid Mosaic Model Major Membrane Components Phospholipids Phosphate, glycerol, 2 fatty acids Fatty acid composition influences membrane fluidity Hydrophilic phosphate; hydrophobic fatty acids Cholesterol Influences membrane fluidity (flexibility) Glycoproteins Important in cell-to-cell recognition Proteins Integral ? passes through cell membrane Peripheral ? attached to one side of membrane Phospholipids Proportion of saturated and unsaturated fatty acid tails affect membrane fluidity Cholesterol Reduces membrane fluidity Prevents solidification of membrane at low temperatures Glycoproteins Carbohydrate chains (attached to proteins) vary between species, individuals, and even cell types Important in identifying ?self?

Human Geo

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Human Geography

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G protein–coupled receptor

Biochemical cascade

Paracrine signalling

Protein kinase

Chapter 11 Cell Communication Overview: The Cellular Internet Cell-to-cell communication is essential for multicellular organisms Biologists have discovered some universal mechanisms of cellular regulation The combined effects of multiple signals determine cell response For example, the dilation of blood vessels is controlled by multiple molecules Copyright ? 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Fig. 11-1 Concept 11.1: External signals are converted to responses within the cell Microbes are a window on the role of cell signaling in the evolution of life Copyright ? 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Evolution of Cell Signaling

quiz 8

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Adenosine triphosphate

Chemokine receptor

A cell lacking glycoproteins on the external surface of its plasma membrane would likely be inefficient in a. transporting ions against a concentration gradient b. cell-cell recognition c. maintaining fluidity of the phospholipid bilayer d. attaching to the cytoskeleton e. establishing the diffusion barrier to charged molecules. White blood cell engulf bacteria through what process? a. exocytosis b. phagocytosis c. pinocytosis d. osmosis e. active transport During signal-transduction Ca++ and cAMP function as a. ligands. b. receptors. c. secondary messengers. d. inhibitors. e. responders

BIO CH 11

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G protein–coupled receptor

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Intracellular receptors

Steroid hormone receptor

Protein kinase A

Protein kinase

Receptor tyrosine kinase

Receptor

Campbell's Biology, 9e (Reece et al.) Chapter 11 Cell Communication Students will encounter the topic of cell signaling repeatedly in this course and throughout their studies of biology. Therefore, the more confident they are regarding the basic principles, the more successful they are liable to be when encountering the topic. This chapter includes more higher-skill-level questions and makes connections to the principle of evolution as well as to other chapters of the text. Multiple-Choice Questions 1) Using the yeast signal transduction pathways, both types of mating cells release the mating factors. These factors bind to specific receptors on the correct cells, A) which induce changes in the cells that lead to cell fusion.

Membrane Reception Activity

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G protein-coupled receptor

Membrane Reception Activity Work in groups of 3-4.

Cell Communication

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Integral membrane proteins

Second messenger system

G protein-coupled receptor

Adenylate cyclase

Chapter 11 Cell Communication Overview: The Cellular Internet essential for multicellular organism the combined effects of multiple signals determine cell response Concept 11.1: External signals are converted into responses within the cell Evolution of Cell Signaling yeast cells identify their mates by cell signaling a signal transduction pathway is a series of steps by which a signal on a cell?s surface is converted into a specific cellular response pathway similarities suggest that ancestral signaling molecules evolved in prokaryotes and were modified later in eukaryotes Local and Long Distance Signaling the concentration of signaling molecules allows bacteria to detect population density cells in a multicellular organism communicate via chemical messengers

Campbell Biology Chapter 11 Outline

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Integral membrane proteins

G protein-coupled receptor

Receptor

Second messenger system

Mica Piro Chapter 11: Cell Communication External Signals are Converted to Responses Within the Cell (11.1) Evolution of Cell Signaling One topic of sell ?conversation? is sex?a type of yeast cell identify their mates by chemical signaling 2 sexes: a and ? Each type secretes a specific factor that binds to receptors only on the other type of cell When exposed to each other?s mating actors, a pair of cells of opposite type change shape, grow toward each other, and fuse/matethe new a/? cell contains all the genes of both original cells Once received by the yeast cell surface receptor, a mating signal is changed, or transduced, into a form that brings about the response of mating, which occurs in a series of steps called a signal transduction pathway

Campbell AP Biology Study Guide Ch 11

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Campbell's Biology, 9e (Reece et al.) Chapter 11 Cell Communication Students will encounter the topic of cell signaling repeatedly in this course and throughout their studies of biology. Therefore, the more confident they are regarding the basic principles, the more successful they are liable to be when encountering the topic. This chapter includes more higher-skill-level questions and makes connections to the principle of evolution as well as to other chapters of the text. Multiple-Choice Questions 1) Using the yeast signal transduction pathways, both types of mating cells release the mating factors. These factors bind to specific receptors on the correct cells, A) which induce changes in the cells that lead to cell fusion.

Campbell Biology 9th Edition Chapter 10-13 Study Guide

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Meiosis

Cell growth

Signal transduction

Kinetochore

Chapter 10 Photosynthesis The production of organic fuel from energy Carbon dioxide + water + energy organic compounds + oxygen Is a redox reaction Water is split and electrons transferred with H+ from H2O to CO2, reducing it to sugar Autotrophs: ?producers? able to produce their own organic compounds Produce their own organic molecules from CO2 and other inorganic raw materials obtained from the environment Heterotrophs: ?consumers? who must obtain organic compounds from other organisms or substances Where does photosynthesis occur? Chloroplasts in the leaves of plants Chloroplasts are found mainly in mesophyll cells forming the tissues in the interior of the leaf O2 exits and CO2 enters the leaf through microscopic pores called stomata in the leaf

Campbell Biology 9th Edition Chapter 10-13 Study Guide

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Meiosis

Cell growth

Signal transduction

Kinetochore