BIOL 225 Chapter 41 part 1_Au - Announcements WATER PLANTS...

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Announcements WATER PLANTS TODAY Tadpole coprophagy lab report due tomorrow PAGE lab tomorrow – print and read lab exercise, print “Molecular Weight Determination” handout & lab report prelab due on Sakai assign. 15 min before lab LRQ Ch 41 on Wed 12/3 Science in my life essay due F 12/12
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Animal renal systems - water and waste part 1 Chapter 41
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Outline Importance of water balance Osmoregulation Freshwater fish Saltwater fish Terrestrial animal osmoregulation Nitrogenous waste forms Vertebrate kidney and excretion Mammalian kidney
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What will happen to an animal cell in a hypotonic environment? (Discuss why with your neighbor) A. The cell will shrivel. B. The cell will burst. C. The cell shape will stay relatively the same. D. None of the above.
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Animal cells need to remain in isotonic environments
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Osmosis governs the movement of water across cell membranes
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Osmoconformers do not actively regulate their water levels Live in isotonic environment Selective uptake of needed ions From Dr. Laurie-Berry En.wikipedia.org
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Osmoregulators have _____________________ internal solute concentrations compared to their external environment. a. the same b. different c. always lower d. always higher
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Outline Importance of water balance Osmoregulation Freshwater fish Saltwater fish Terrestrial animal osmoregulation Nitrogenous waste forms Vertebrate kidney and excretion Mammalian kidney
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Osmoregulation is the control of osmotic pressure inside cells and organisms
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Salmon use different osmoregulatory strategies in their life cycle
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Saltwater fish are in a hypertonic environment and work to conserve water Gain of water and salt ions from food and by intake of seawater Osmotic water loss through gills and other parts of body surface Salt water Excretion of excess ions and small amounts of water in concentrated urine from kidneys Excretion of salt from gills
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Saltwater fish are in a hypertonic environment and work to conserve water
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Freshwater fish are in a hypotonic environment and work to get rid of water Fresh water Excretion of large amounts of water in dilute urine from kidneys Uptake of salt ions by gills Uptake of some ions in food Osmotic water gain through gills and other parts of body surface
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Freshwater fish are in a hypotonic environment and work to get rid of water
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Many marine birds excrete salt from nasal glands
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Outline Importance of water balance Osmoregulation Freshwater fish Saltwater fish Terrestrial animal osmoregulation Nitrogenous waste forms Vertebrate kidney and excretion Mammalian kidney
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Which process is responsible for creating most of an animal’s nitrogen waste?
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