1. Chapter 6 Review Questions
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
Pg 6-29 #1-8 31
Pg 6-34 #1-3 32
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?

2. Chapter 6.5: Chemical Factors That Affect Marine Life
INB Pg 30

3. 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.

4. 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.

5. 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.

6. Osmoregulators
Marine fish that have a regulation process that allows them to use active transport to adjust water concentration within their cells are osmoregulators.

7. Osmoconformers
Marine organisms that have their internal salinity rise and fall along with the water salinity are osmoconformers.
Ex: invertebrates and cartilaginous fish

8. 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