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17 Cards in this Set

  • Front
  • Back
anatomy of blood vessels
veins
same as arteries
tunica media thinner, shape not as defined, valves
anatomy of blood vessels
vasomotion
contraction, relaation of smooth muscles
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
blood pressure
BP
systolic - 115
diastolic - 75
blood pressure
capillary hydrostatic pressure
within beds
35-18 mm Hg
blood pressure
veins
18 mm Hg
blood pressure
pressure factors
vasscular resistance
vessel length
vessel diameter
viscosity
turbulence
musclular compression
respiratory pump
capillary exchange
simple diffusion/osmosis
-hydrostatic pressure
-osmotic pressure
filration
reasbsorption
net filtration pressure (NFP)
cardiovascular regulation
types
auto regulation
-local factors
-O2, CO2, nutrients, activity
-NO from endothelial cells
-rising K+ or H+
- Histamines
Cardiovascular regulation
neural mechanism - responds
cardioacceleratory center
cardioinhibitory center
control of vasconstriction
control of vasodilation
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
Cardiovascular regulation
neural mechanism - responds
cardioacceleratory center
cardioinhibitory center
control of vasconstriction
control of vasodilation
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
cardiovascular regulation
hormones, ADH
ADH- responds to BP decrease (increase BP by vasoconstriction and H2O conservation at the kidney,) or angiotensin II
cardiovascular regulation
hormones, Angiotensin II
from renin, from juxtaglomerular cells in kidney
cardiovascular regulation
hormones, erythopoietin
EPO- from kidneys, esp. If O2 is low
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