13048713
Description
Flashcards by J yadonknow, updated more than 1 year ago
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Created by J yadonknow
over 6 years ago
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| Question | Answer |
| How is total body water portioned? | Total = (0.6*BW) ICF = 0.4*BW ECF=0.2*BW ISF=0.75*ECF Plasma = 0.25*ECF |
| How is the OSP maintained? (4) | Solutes/Water must pass through ECF ECF/ICF in osmotic equilibrium Equilibriation of ICF/ECF osmolality occurs primarily due to H2O shifts Plasma and ISF are essentially isosmotic |
| How do pressure differences change through a capillary? | P= HSP of Cap Pi = OSP of Cap P>Pi = net filt. P<Pi = net reabs. |
| What are the electrolyte compositions of these various fluids? | Plasma/ISF similar as only one cell thick barrier Muscle cells can alter their ISF comp. via transport mechanisms. |
| How is osmoregularity maintained in FW fish? | HCO3- <-> Cl- H+ <-> Na+ Water continuously expelled A.T. of monovalent ions against their [ ]' to retain in plasma |
| Aquaporins | speed up h2o movement 12 molecular forms |
| Transcellular transport | -> apical / basolateral membrane |
| Paracellular transport | Across ep. -> IC gaps |
| What is the reaction for the catabolism of food stuffs? | c6h12o6 + 6o2 -> 6co2 + 6h2o |
| What are the obligatory water losses associated with metabolism? | Respiratory - ambient humidity+physio Urinary - pro. catabolism nitro waste Faecal Met. gains - obl. losses = not gain/loss |
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