Do Now 115 WOD ELOQUENT EL oh kwent
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Do Now 11/5 • WOD: ELOQUENT (EL oh kwent) adj. • extremely expressive in speech, writing, or movement • Stan gave a moving, ELOQUENT speech. • Shakespeare’s plays are very ELOQUENTLY written. 11/5 Chapter 6. 5 notes 30 11/5 Pg 6 -29 #1 -8 31 11/5 Pg 6 -34 #1 -3 32 11/5 Chapter 6 Review Questions 33 1. ) How do the proportions of organic elements in seawater differ from the proportions of sea salts? 2. ) What is the biogeochemical cycle?
Chapter 6. 5: Chemical Factors That Affect Marine Life INB Pg 30
Diffusion and Osmosis � Diffusion is the tendency for a liquid, gas, or solute to flow from an area of high concentration to an area of low concentration. � Osmosis is diffusion through a semipermeable cell membrane.
Diffusion and Osmosis � This has important implications with respect to marine animals. ◦ Hypertonic - having a higher salt concentration, and the water will diffuse into the cells. �It is what happens when you put a marine fish into fresh water. ◦ Isotonic - when water concentration inside the cell is the same as the surrounding water outside the cell. There is no osmotic pressure in either direction. �Marine fish cells are isotonic. ◦ Hypotonic - having a lower salt concentration than the surrounding water. �It is what happens when you put a freshwater fish into seawater.
Active Transport, Osmoregulators, and Osmoconformers � Osmosis through a semipermeable cell membrane is called passive transport. ◦ Passive transport moves materials in and out of a cell by normal diffusion. � The process of cells moving materials from low to high concentration is called active transport. ◦ Active transport takes energy because it goes against the flow of diffusion.
Osmoregulators � Marine fish that have a regulation process that allows them to use active transport to adjust water concentration within their cells are osmoregulators.
Osmoconformers � Marine organisms that have their internal salinity rise and fall along with the water salinity are osmoconformers. ◦ Ex: invertebrates and cartilaginous fish
Chapter 6 Review Questions These questions will be tested on the free response portion of your Ch 6 exam (11/14) � 6 -4: 2, 3 � 6 -9: 2, 3, 4, 6, 7, 8 � 6 -23: 1, 2, 4 � 6 -30: 1, 2, 3 � ALL multiple choice questions from homework are fair game for scantron portion of exam
