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Cells, Diffusion, & Respiration: Understanding the Basic Unit of Life

This unit explores the different types of cells, organelles, and cell processes such as diffusion, osmosis, active transport, and cellular respiration. Discover how cells maintain homeostasis and function in various conditions.

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Cells, Diffusion, & Respiration: Understanding the Basic Unit of Life

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  1. Thursday 2-11-2010 Unit 1: Cells, Diffusion & Respiration

  2. (1) Cells • Cell = Basic unit of life. • Types: • Prokaryotic • Eukaryotic

  3. (2) Organelles • Organelle = Specialized membrane structure w/in a cell. • Types: • Nucleus • Endoplasmic Reticulum • Ribosomes • Golgi Apparatus / Body • Mitochondria • Lysosomes

  4. (3) Cell Membrane • Outermost covering of cells. • Cell Wall = Exception. • Structure: • Phospholipid Bilayer • Embedded Protein Channels • Function: • Traffic Control

  5. (4) Diffusion • High  Low…. Until Equilibrium • Concentration Gradient • No Energy

  6. (5) Osmosis • Water • High  Low… Until Equilibrium • Concentration Gradient • No Energy • Semipermeable Membrane

  7. (6) Hypertonic & Hypotonic • Water Solutions • Hyper = [High Solute] • Hypo = [Low Solute]

  8. (7) Active Transport • Low  High…. Against Equilibrium • Against Concentration Gradient • Energy • Protein Channels

  9. (8) Cellular Respiration • Mitochondria • C6H12O6 + 6O2 6CO2 + 6H2O + ATP • Energy Transfer: Glucose  ATP • Carbohydrate Metabolism

  10. (9) Homeostasis • Stability • Conditions: • pH  Acids & Bases • Temperature • Water • [Ion]  Electrolytes

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