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Diffusion2
Diffusion2
Diffusion2
Diffusion2
Diffusion2
Diffusion2
Diffusion2
Diffusion2
Diffusion2
Diffusion2
Diffusion2
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Diffusion2

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ppt - Diffusion2

ppt - Diffusion2

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  • 1. Diffusion and the Molecules of Life Levels of Hierarchy and Organization in Living Systems and Multi-cellular organisms
  • 2. Molecules of Life Main Functions Component C-chain
  • 3. Anatomy and Physiology in the Hierarchy of Life <ul><li>Molecules </li></ul><ul><ul><li>Cells </li></ul></ul><ul><ul><ul><li>Tissues </li></ul></ul></ul><ul><ul><ul><ul><li>Organs/Structures </li></ul></ul></ul></ul><ul><ul><ul><ul><li> Organ Systems </li></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>Organisms </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li> Environment </li></ul></ul></ul></ul></ul>
  • 4. Levels of Organization within Human Body
  • 5. Levels of Organization <ul><li>Chemical Level (Organic Chemistry and Biochemistry </li></ul><ul><li>Cellular Level (Intro. Or Cell Biology): organelles, genes, mitosis, meiosis </li></ul><ul><li>Tissue Level (Histology): groups of cells with common function—classes of tissues, epithelia (covering), connective tissues (support, protection) </li></ul><ul><li>Organ Level (Anatomy): how tissues combine to form structures in body—lungs, bones, blood vessels, etc. </li></ul><ul><li>Organ System level (Physiology) How organs and structures work together to accomplish specific functions: e.g., circulatory system, nervous system, skeletal system, etc. </li></ul><ul><li>Organism: Entire body working together (Ecology or physiology in environment) </li></ul>
  • 6. The importance of Diffusion <ul><li>Diffusion versus Osmosis (diffusion across a membrane) </li></ul><ul><li>Diffusion fast and effective across microscopic distance </li></ul><ul><li>Virtually all living processes involve diffusion and/or osmosis </li></ul><ul><li>Cell membranes control diffusion and allow for life chemical reactions to take place </li></ul><ul><li>Diffusion lets tissues do job and permits organ systems to function </li></ul><ul><li>Examples: </li></ul><ul><ul><li>Oxygen in circulatory </li></ul></ul><ul><ul><li>system </li></ul></ul><ul><ul><li>Food in digestive </li></ul></ul><ul><ul><li>system </li></ul></ul><ul><ul><li>Calcium in muscular </li></ul></ul><ul><ul><li>function </li></ul></ul><ul><ul><li>Nerve impulses </li></ul></ul>Cell membranes and Diffusion
  • 7. Body Systems and Diffusion <ul><li>Understand path through body of: </li></ul><ul><li>Food/Nutrients (glucose) </li></ul><ul><li>Oxygen </li></ul><ul><li>Carbon Dioxide </li></ul><ul><li>Nitrogen </li></ul>
  • 8. Homeostasis “…the ability to maintain relatively constant internal conditions even though the outside world changes continuously…” <ul><li>Within cells </li></ul><ul><li>Within body </li></ul>
  • 9. Feedback Mechanisms <ul><li>Negative Feedback Examples </li></ul><ul><ul><li>home heating system </li></ul></ul><ul><ul><li>Glucose regulation in blood </li></ul></ul><ul><li>Positive Feedback Examples </li></ul><ul><ul><li>Fire-Starting </li></ul></ul><ul><ul><li>Blood clotting </li></ul></ul>
  • 10. Web Links <ul><li>Cellular basis of physiology </li></ul><ul><li>Diffusion/Osmosis animation </li></ul>
  • 11. Next Time: Overview of Body Systems

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