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Z331 Fall 2010 Ecampus Week 1 Cells Posted

Z331 Fall 2010 Ecampus Week 1 Cells Posted - Week1:...

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Week 1: Chapter 3 -   The Cellular Level of  Organization
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The Cell Performs all life functions basic structural and functional units of life respond to their environment maintain homeostasis at the cellular level modify structure and function over time 3-1, 64
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Sex Cells Sex cells (germ cells): reproductive cells male sperm female oocytes (eggs) Somatic Cells Somatic cells ( soma = body): all body cells except sex cells Chapter 4 images Chapter 28 images
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The Cell Membrane Functions (p. 63) Isolation Intracellular fluid cytosol Extracellular fluid Called interstitial fluid if in tissues Regulation Sensitivity Support Fig 3-1, 64
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Structure of the Cell Membrane Fig 3-2, 66 Contains lipids, carbohydrates, and functional proteins
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Phospholipid Bilayer Double layer of phospholipid molecules: hydrophilic heads— toward watery environment, both sides hydrophobic fatty-acid tails—inside membrane barrier to ions and water soluble compounds Hydrophilic heads Cholesterol 3-2, 66
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Membrane Proteins Integral proteins & Peripheral proteins 6 Functions Anchoring Recognition Enzymes Receptors Carrier Proteins Channels 3-2, 66
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Cytoplasm
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