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A and P Pt 1

QuestionAnswer
Two cardiovascular circuits? Pulmonary circuit,Systemic circuit
Function of pulmonary circuit? Oxygenates blood
Function of systemic circuit? Delivers oxygen and nutrients
Four heart chambers? Right atrium,Right ventricle,Left atrium,Left ventricle
Three vessel wall layers? Tunica intima,Tunica media,Tunica externa
Function of tunica intima? Smooth surface,controls permeability
Function of tunica media? Vasoconstriction,vasodilation
Function of tunica externa? Protection,anchoring
Thickest layer in arteries? Tunica media
Thickest layer in veins? Tunica externa
Why do veins have valves? Prevent backflow
Capillary wall made of? Endothelial cells,basement membrane
Main function of capillaries? Exchange of gases,nutrients,wastes
Protein for stretch and recoil? Elastin
Protein for strength? Collagen
Elastic arteries function? Stretch with heartbeat
Arterioles role? Control resistance,blood pressure
Three capillary types? Continuous,Fenestrated,Sinusoid
Most permeable capillary? Sinusoid
Fenestrated capillaries found where? Kidneys,intestines
Hemodynamics? Study of blood flow
Bulk flow law depends on? Pressure difference,resistance
Most powerful factor affecting flow? Vessel radius
Effect of decreased radius? Decreased blood flow
Mean arterial pressure (MAP)? Average pressure driving blood flow
Effect of increased blood viscosity? Decreased blood flow
Why is blood flow slowest in capillaries? Large total cross-sectional area
Force pushing fluid out of capillaries? Hydrostatic pressure
Force pulling fluid into capillaries? Colloid osmotic pressure
If hydrostatic pressure exceeds osmotic pressure? Filtration occurs
Vascular homeostasis? Regulation of blood volume,blood pressure
Three BP regulation mechanisms? Autoregulatory,neural,endocrine
Baroreceptors respond to? Mean arterial pressure
Baroreceptors located where? Carotid sinus,aortic arch
Chemoreceptors respond to? Blood pH,CO2,O2 levels
RAAS begins where? Kidneys
First hormone released in RAAS? Renin
Angiotensin II effects? Vasoconstriction,aldosterone release
Aldosterone causes retention of? Sodium,water
Overall effect of RAAS? Increase blood volume,blood pressure
Created by: user-2027468
 

 



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