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8 Cards in this Set

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  • Back
Which contains the larger proportion of blood, arteries or veins?
Veins, contain the highest proportion of the blood, the unstressed volume.
What is Poiseuille's equation for resistance?
R= 8Nl
______
3.14(r4)

R=resistance
N=viscosity of blood
l=length of blood vessel
r=radius of blood vessel
Which component of the vascular system is the site of the highest resistance?
The arterioles
Resistance is regulated via the ANS. TRUE/FALSE
TRUE
On which arterioles are alpha-1 adrenergic receptors found?
Skin
Renal circulation
Splanchnic circulation
On which arterioles are beta-2 adrenergic receptors found?
Skeletal muscle
What is unique about the capillary bed system of the vasculature?
It has the largest cross sectional area and surface area, which allows for the effecient exchange of nutrients water and gases.
What is unique about the pulmonary vasculature compared to the systemic?
Hypoxia causes vasoconstriction of the pulmonary vasculature. In most organs hypoxia causes vasodilation.