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Related Flashcards
Cards In This Set
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Capillaries
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Simple squamous epithelium & layer of loose CTSubstances move through by diffusion
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Continuous Capillaries
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Normal
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Fenestrated Capillaries
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Have many windows, so they're leaky. They are common in the glomeruli of the kidneys.
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Capillary Network
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Arterioles are incomingVenules are outgoingMetarteriole is the beginning of capillary bedIf the precapillary sphincter is closed, blood goes through the thoroughfare channels between
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Tunica Intima
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InsideEndothelium, basement membrane, CT & elastic fibers
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Tunica Media
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MiddleCircular, smooth muscle cells
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Tunica Externa
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OutsideCT, gives toughness to artery
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Vasovasorum
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Blood vessels of the blood vessels
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Elastic Arteries
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Large diameter, lots of elastic tissue, usually near heart so there is lots of pressure
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Muscular Arteries
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Smooth muscles allows them to regulate blood suppy; Adapted for vasodilation & vasoconstriction
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Arterioles
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Itty bitty arteries which connect arteries to capillaries
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Venules
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Drain capillary bedsEndothelium, basement, smooth muscle cells
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Small veins
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Collect blood from venulesSmooth muscle with collagenous CT
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Hyperkalemia
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Extra potassiumDepolarizes cardiac cells, opens some K+ channels, but not enough to generate AP
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Local Control of BP
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- Renin-Angiotensin-Aldostrone Mechanism (RAAM)- ADH Mechanism- Atrial Natriuretic Hormone- Fluid Shift Mechanism- Stress Relaxation Response
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