Lecture 1 - Chemistry of Bio (1)

Lecture 1 - Chemistry of Bio (1) - between the atoms of a...

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Humans in the World of Biology Biology Life
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Living Organisms Share Basic Characteristics Contain biomolecules Composed of cells Reproduce Acquire and use energy and raw materials Respond to stimuli Maintain homeostasis Populations evolve
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Life Has Many Levels of Organization Life extends from the microscopic to the global scale
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Basic Chemistry Helps Us Understand Human Biology Matter All forms of matter are made up of atoms
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Atoms Composed of subatomic particles Particle Charge Mass Location
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Elements Element
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Essential Elements
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Elements Atoms of the different elements differ in their number of subatomic particles Atomic Number
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Isotopes Isotopes Atomic mass
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Chemical Bonds Chemical bonds Covalent bonds Ionic bonds
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Electron Configuration
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Covalent Bond Molecule
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All covalent bonds are not the same Electrons are not always shared evenly
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Unformatted text preview: between the atoms of a covalent bond Polar Molecules Nonpolar Molecules Ionic Bond Ion Anion Cation Ionic Bond Water is essential to life Unique properties of water due to its structure (polarity) Excellent solvent Moderates temperature Hydrogen bond Water is an excellent solvent Water is an excellent solvent Hydrophilic substances Hydrophobic substances Water moderates temperature High heat capacity High heat of vaporization Acids and Bases Sometimes water molecules dissociate: Acids and bases influence [H + ] H 2 0 H + + OH-Acids and Bases Acid: Base: The pH Scale pH pH scale ranges from 0-14 Buffers Many body fluids have the buffering capacity...
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This note was uploaded on 04/22/2009 for the course BIO 309D taught by Professor Jessicawandelt during the Spring '08 term at University of Texas at Austin.

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Lecture 1 - Chemistry of Bio (1) - between the atoms of a...

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