Chapter 44 Notes (Excretion)

Chapter 44 Notes (Excretion) - Chapter 44 Notes (Excretion)...

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Chapter 44 Notes (Excretion) 1. Key Terms A. Excretion: The process of eliminating the waste. B. Osmoregulation: How animals regulate and balance the salinity (solute concentration) and balance the gain and loss of water. C. Osmolarity: The total solute concentration expressed by the moles of solutes per liter. 2. Osmoconformer / Osmoregulator A. Osmoconformer: The animals that do not actively adjust its osmolarity on its own, but rather follow the environment (e.g marine fish). B. Osmoregulator: The animals that actively adjust its osmolarity on its own (e.g terrestrial organism). 3. Stenohaline / Euryhaline A. Stenohaline: Animals that cannot tolerance extreme environmental change. B. Euryhaline: Animals that can survive in huge change of salinity (osmolarity). 4. Three Types of osmoregulation A. Hyperosmotic: needs to take in a lot of water since water keeps coming out. B. Isosmotic: No change in osmolarity; therefore no adjustment C. Hypoosmotic: needs to discharge a lot of water since water keeps coming in. 5. Environmental Adjustments A. Anhydrobiosis: The complete dried up situation. (Tardigree) i. When the environment is much better, it gets hydrated and alive again. B. Transport epithelia: Layers of epithelia that control salinity. i. Removes excess NaCl from blood ii. Move specific solutes in specific direction with certain amount. iii. Arranged in network system; therefore connected by tight junction. iv. Large surface area and semipermeable 6. Osmoregulation in different animals
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Chapter 44 Notes (Excretion) A. Marine animals i. Gain of water and solutes by drinking. ii.
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Chapter 44 Notes (Excretion) - Chapter 44 Notes (Excretion)...

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