Lesson 2 cont.
   When there is water on 2 sides of a membrane    with different concentrations of solutes (ex.    Salt), H20 will diffu...
   Fish cells have higher concentration of salt than    surrounding freshwater. (fish is hypotonic).   Water will diffus...
   Reverse happens.   Fish cells are hypertonic (lower salt, higher H20    concentration than surrounding water)   Wate...
   Moves from Low concentration to High –    REQUIRES ENERGY!!!!!!   Fish use active transport to control water    conce...
   Consume a great deal of h20 and excrete small    amount of urine to replace water lost by    osmosis   Specialized gl...
   Adapt by using waste urea to maintain internal    tissue balance.   When external salinity changes so does their    i...
   Cannot control internal water concentration   internal salinity rises and falls with    surrounding salinity       O...
   Finish analysis and conclusion for Lab 4 and    turn in!!!!!!!!!!!!!!!!!!!       Last lab grade for Session 1   REME...
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Lesson 2 osmosis and diffusion in the marine environment

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Lesson 2 osmosis and diffusion in the marine environment

  1. 1. Lesson 2 cont.
  2. 2.  When there is water on 2 sides of a membrane with different concentrations of solutes (ex. Salt), H20 will diffuse to the lower concentration Important in Marine environments
  3. 3.  Fish cells have higher concentration of salt than surrounding freshwater. (fish is hypotonic). Water will diffuse into fish’s cells Cells will eventually burst from excess water pressure Queen Angel-local to Keys
  4. 4.  Reverse happens. Fish cells are hypertonic (lower salt, higher H20 concentration than surrounding water) Water diffuses out of cells  Fish dies of dehydration Walleye-local to Great Lakes (sport fish)
  5. 5.  Moves from Low concentration to High – REQUIRES ENERGY!!!!!! Fish use active transport to control water concentration inside their cells  Allow to adapt to changes in salinity of surrounding waters  Called osmoregulators
  6. 6.  Consume a great deal of h20 and excrete small amount of urine to replace water lost by osmosis Specialized glands in gills to eliminate excess salts Atlantic cod
  7. 7.  Adapt by using waste urea to maintain internal tissue balance. When external salinity changes so does their internal salinity to remain isotonic Why some species flesh smells like urine Angel Shark
  8. 8.  Cannot control internal water concentration internal salinity rises and falls with surrounding salinity  Osmoconformers Some species can tolerate significant change in salinity, others cant and suffer stress Cannonball Jelly- commonly washed up at Jax beach, Important food source for endangered leatherback turtles
  9. 9.  Finish analysis and conclusion for Lab 4 and turn in!!!!!!!!!!!!!!!!!!!  Last lab grade for Session 1 REMEMBER ALL MAKEUP WORK IS DUE THIS FRIDAY 10/18

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