Flashcards
Urinary Systems and Electrolytes II
Cards in this deck (12)
- 1OsmoregulationMaintenance of constant/near constant blood plasma OSP
- 2OsmoconformerFollow isosmotic line by matching blood OSP to enviro OSP
- 3Ionic regulationIonoregulators ionoconformers
- 4Volume regulationself explanatory
- 5FW crab kidneys (4)1. Regulate volume only
2. water by osmosis = urine excreted
3. Haemolymph isotonic w urine
4. Haemolymph hyperosmotic to water - 6What is a hyperosmotic regulator?All FW animals BOP is hyper to H2O
- 7What challenges to FW fish face?Volume reg - H2O constantly enters body from dilute enviro.
Osmotic reg - Entering H2O lowers the ECF OSP
Ionic reg - Ions move from ECF to more dilute surrounding water
Entering water also dilutes the ECF - 8What are FW gills comprised of?90% Pavement cells for O2 uptake
MRC cells which are Cl- channels, ion channels - 9What compromise must gills make?If more MRC then less O2 uptake
- 10How do marine fish gain water?Integuments and epithelia of marine fish are poorly penetrated by SW
Drink SW, co-absorbed in gut epithelia with monovalent ions - 11What problem does this pose?Upsets ionic regulation
- 12How do marine fish excrete waste?Divalent ions from kidneys
Na+/Cl-/nitro. waste from gills
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- User has deleted their subject information Flashcards on Urinary Systems and Electrolytes II, created by Deleted user on 30/03/2018.
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- Created by J yadonknow · Mar 29, 2018
- Copied by J yadonknow · Mar 30, 2018
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