Circulation Hemodynamics and pressure reg B6 Flashcards
All vessels are lined with __________
endothelium (important in controlling blood flow and pressure)
True/false: Aorta is very elastic and doesn’t need very much pressure.
True
___________ are very muscular, control BP and blood flow to tissues, SNS innervation- Alpha 1
B2 receptors- when dump epi out, you get some vasodilation
Arterioles
__________ are thin walled vessels, with only a single layer of endothelium.
Capillaries
_____ are thin walled vessels that are very compliant, low pressure, high volume, small amount of smooth muscle, SNS innervation-A1, B2 receptors
Veins
Systemic circuit flow of blood
Aorta–Artery–Arteriole–Capillaries–Venules–Veins–Vena Cava
Blood flows from ____ pressure to ___ pressure.
high
low
As resistance increases, flow ____.
slows
As pressure difference drops, flow ______
slows
__________ of blood flow is dependent upon size of total area of the vessels
Velocity
True/False: Blood flows slowest through single large vessels, and fastest through many small vessels.
False, Fastest through single large vessels
slowest through many small vessels
At which level of the vasculature is blood pressure most controlled.
Arterioles
At which level of the vasculature is venous return most controlled?
Veins
Administration of an Alpha 1 receptor agonist would decrease blood flow to which kind of vessel.
Capillaries
Why is the venous system such a low pressure system, despite containing the most volume?
High compliance vessels
As diameter goes down, ___________ goes up.
resistance
