E chapter 1 - Chapter 1 Introduction to Cells Copyright...

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Chapter 1 Introduction to Cells Copyright © Garland Science 2010
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CHAPTER CONTENTS UNITY AND DIVERSITY OF CELLS CELLS UNDER THE MICROSCOPE THE PROCARYOTIC CELL THE EUCARYOTIC CELL MODEL ORGANISMS ESSENTIAL CONCEPTS
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UNITY AND DIVERSITY OF CELLS • Cells Vary Enormously in Appearance and Function • Living Cells All Have a Similar Basic Chemistry • All Present-Day Cells Have Apparently Evolved from the Same Ancestor (existed 3.5-3.8 billion years ago) • Genes Provide the Instructions for Cellular Form, Function, and Complex Behavior
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Figure 1-3 Essential Cell Biology (© Garland Science 2010) • All living things are constructed from one or more cells, i.e. cells are the fundamental units of life.
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Figure 1-1 Essential Cell Biology (© Garland Science 2010) Cells are not all alike, they vary enormously in appearance and function Cerebellar neuron Protozoan Paramecium Cells in plant stem: cellulose, pectin Bdellovibrio bacteriovourous Neutrophil approaching and engulfing a red blood cell
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Figure 1-2 Essential Cell Biology (© Garland Science 2010) All living things are fundamentally similar inside : 1. Cells share the same machinery for the most basic functions 2. All cells are composed of the same sorts of molecules and participate in the same types of chemical reactions
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Modern cell biology has resulted from a convergence of three disciplines: cytology (deals with cellular structure through the use of optical techniques), biochemistry (chemistry of biological structure and function) and genetics (information flow)
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CELLS UNDER THE MICROSCOPE • The Invention of the Light Microscope Led to the Discovery of Cells • Cells, Organelles, and Even Molecules Can Be Seen Under the Microscope
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Types of microscopy Light (beam of light) •b r i g h t f i e l d phase contrast interference contrast Fluorescence (filtered light, only certain wave lenght) Confocal (provides optical section scanning with a laser beam) Electron (beam of electrons) scanning (three dimensional) transmission
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Figure 1-6 Essential Cell Biology (© Garland Science 2010)
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Figure 1-5 Essential Cell Biology (© Garland Science 2010) Plant and animal tissues are made of cells, i.e., the cell is the basic unit of structure for all organisms Fern root tip Kidney ducts
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Figure 1-4
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This note was uploaded on 09/17/2009 for the course BIOS 222 taught by Professor Warphea during the Spring '08 term at Ill. Chicago.

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E chapter 1 - Chapter 1 Introduction to Cells Copyright...

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