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9 Cards in this Set
- Front
- Back
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Where and when does the A.v shunt open?
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Skin beds
When blushing |
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Local control of blood flow through tissues mediated by what?
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Precapillary sphinsters
Open when low o2 high co2 and H+ |
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Which vessels cover the largest area?
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1. Venulles
2. Cappilaries |
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Largest fall in pressure?
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Arteries -> arteioles
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Most common capillary
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Continuous capillary
-basement membrane containing (lamina densa) -Pericyte: cover epithelical cell -Intracellular cleft -Tight junctions |
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Fenestrated capillary
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associated with fluid movement
-Diaphragm (pores covered with glycolyx) -Basement membrane & intacellular cleft |
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Discontinuous capillary
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Associated with cell migration
Large leaky basement membrane is incomplete |
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Starlings forces of capillary equation?
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Kfc = (Pc - Pi) - (#c - #i)
c's are always in |
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Poiseuilles equation
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F = # (Pi - Po) r^4 / 8#L
#Viscocity of blood Pi - pressure at the beginning Po - pressure at the end L length of tube r = radius |
