Homeostasis Stable internal condition
Three requirements of living things <ul><li>Exchanging gases (CO2 out; O2 in) </li></ul><ul><li>Taking in water, minerals,...
Exchanging gases (CO2 out; O2 in) <ul><li>Taking in water, minerals, and food </li></ul><ul><li>Eliminating wastes </li></...
Molecule movement through membrane <ul><li>Passive transport </li></ul><ul><ul><li>No energy used by the cell  </li></ul><...
Three functions of cell membrane <ul><li>Separate contents of cell from its surroundings </li></ul><ul><li>Controls moveme...
Cell Membrane http://www.wisc-online.com/objects/index_tj.asp?objID=AP1101
Diffusion <ul><li>Movement of molecules from a region in which they are highly concentrated to a region in which they are ...
Equilibrium <ul><li>Static- occurs when there is no action taking place </li></ul><ul><li>Dynamic-occurs when two opposing...
Factors of diffusion <ul><li>Amount of kinetic energy (temperature) </li></ul><ul><li>Size of the molecule </li></ul><ul><...
Molecules permeable to cell membrane <ul><li>Small molecues like: </li></ul><ul><ul><li>CO2 </li></ul></ul><ul><ul><li>O2 ...
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Homeostasis Intro.Doc

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Transcript of "Homeostasis Intro.Doc"

  1. 1. Homeostasis Stable internal condition
  2. 2. Three requirements of living things <ul><li>Exchanging gases (CO2 out; O2 in) </li></ul><ul><li>Taking in water, minerals, and food </li></ul><ul><li>Eliminating wastes </li></ul><ul><li>These tasks require molecules to move through the cell membrane. </li></ul>
  3. 3. Exchanging gases (CO2 out; O2 in) <ul><li>Taking in water, minerals, and food </li></ul><ul><li>Eliminating wastes </li></ul><ul><li>These tasks require molecules to move through the cell membrane. </li></ul>
  4. 4. Molecule movement through membrane <ul><li>Passive transport </li></ul><ul><ul><li>No energy used by the cell </li></ul></ul><ul><ul><li>occurs naturally </li></ul></ul><ul><li>Active transport </li></ul><ul><ul><li>Requires energy by the cell to move molecules </li></ul></ul>
  5. 5. Three functions of cell membrane <ul><li>Separate contents of cell from its surroundings </li></ul><ul><li>Controls movement of materials into and out of cell </li></ul><ul><li>Interacts with the environment surrounding the cell </li></ul>
  6. 6. Cell Membrane http://www.wisc-online.com/objects/index_tj.asp?objID=AP1101
  7. 7. Diffusion <ul><li>Movement of molecules from a region in which they are highly concentrated to a region in which they are less concentrated. </li></ul><ul><li>It will continue until the system reaches equilibrium, which means the molecules are randomly distributed throughout the system. </li></ul><ul><li>http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter2/animation__how_diffusion_works.html </li></ul>
  8. 8. Equilibrium <ul><li>Static- occurs when there is no action taking place </li></ul><ul><li>Dynamic-occurs when two opposing actions occur at the same rate but in opposite directions </li></ul>
  9. 9. Factors of diffusion <ul><li>Amount of kinetic energy (temperature) </li></ul><ul><li>Size of the molecule </li></ul><ul><ul><li>Smaller molecules will move faster than larger ones </li></ul></ul><ul><li>Charges on the molecues </li></ul><ul><li>Nature of material molecules are moving through </li></ul>
  10. 10. Molecules permeable to cell membrane <ul><li>Small molecues like: </li></ul><ul><ul><li>CO2 </li></ul></ul><ul><ul><li>O2 </li></ul></ul><ul><ul><li>H2O </li></ul></ul><ul><li>More oxygen would move into the cell then out if there is more oxygen outside the cell </li></ul>
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