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17 Cards in this Set
- Front
- Back
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anatomy of blood vessels
veins |
same as arteries
tunica media thinner, shape not as defined, valves |
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anatomy of blood vessels
vasomotion |
contraction, relaation of smooth muscles
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anatomy of blood vessels
capillaries |
only vessels whose walls permit exchange
endothelia tue, basal lamina continuous capillaries -single cell may encircle capillary - tight junction between cells fenestrated - pores sinusoids - basal lamina thin or absent, flattened vessel beds - sphincter, spilts into dozens of capillares |
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blood pressure
BP |
systolic - 115
diastolic - 75 |
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blood pressure
capillary hydrostatic pressure |
within beds
35-18 mm Hg |
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blood pressure
veins |
18 mm Hg
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blood pressure
pressure factors |
vasscular resistance
vessel length vessel diameter viscosity turbulence musclular compression respiratory pump |
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capillary exchange
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simple diffusion/osmosis
-hydrostatic pressure -osmotic pressure filration reasbsorption net filtration pressure (NFP) |
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cardiovascular regulation
types |
auto regulation
-local factors -O2, CO2, nutrients, activity -NO from endothelial cells -rising K+ or H+ - Histamines |
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Cardiovascular regulation
neural mechanism - responds |
cardioacceleratory center
cardioinhibitory center control of vasconstriction control of vasodilation |
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cardiovascular regulation
endocrine mechanisms |
vasomotor tone
reflex control -baroreceptors - carotid sinus, aortic sinus - atrial baroreceptors - blood here=blood at aorta chemoreceptors - carotid bodies, aortic bodies |
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Cardiovascular regulation
neural mechanism - responds |
cardioacceleratory center
cardioinhibitory center control of vasconstriction control of vasodilation |
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cardiovascular regulation
endocrine mechanisms |
vasomotor tone
reflex control -baroreceptors - carotid sinus, aortic sinus - atrial baroreceptors - blood here=blood at aorta chemoreceptors - carotid bodies, aortic bodies |
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cardiovascular regulation
hormones, ADH |
ADH- responds to BP decrease (increase BP by vasoconstriction and H2O conservation at the kidney,) or angiotensin II
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cardiovascular regulation
hormones, Angiotensin II |
from renin, from juxtaglomerular cells in kidney
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cardiovascular regulation
hormones, erythopoietin |
EPO- from kidneys, esp. If O2 is low
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cardiovascular regulation
cardiovascular response |
at rest
heavy excercise -increase output to 25 L/lim - restrict blood to non-essential organs -can increase rate and volume to 50% above normal Light ex. - extensive vasodilation, increased of venous return, cardiac output rises hemorrhaging - short term BP rising, NE, E, ADH output increase immensely |
