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15 Cards in this Set
- Front
- Back
The first priority of blood pressure homeostasis is to maintain adequate perfusion to which two organs?
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Brain and Heart
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Arterioles
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-Their diameter can be altered by neural input.
-Are the main site of variable resistance |
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Arteries
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-Store pressre generated by the heart.
-Have walls that are both stiff and elastic. |
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Capillaries
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-Have thin walls of exchange epithelium.
-Blood flow is slowest through these vessels |
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Veins
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-Carry low oxygen blood
-act as a volume reservoir -Their diameter can be altered by neural input. -Have the lowest blood pressure. |
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Venules
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-Carry low oxygen blood.
-Have thin walls of exchange epithelium. |
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List the four tissue components of blood vessel walls, in order from inner lining to outer covering.
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1.Endothelium
2.Elastic tissue 3.Smooth Muscle 4. Fiberous Connective tissue |
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Function of Endothelium
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Where exchange takes place in capillaries and where important paracrines are secreted.
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Function of Elastic Tissue
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Allows the vessel walls to recoil after being stretched
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Function of Smooth Muscle
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Provides resistance to stretch and contraction of vessel.
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Function of Fiberous Connective Tissue
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Provides resistance to stretch.
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Blood flow to individual tissues is regulated by selective vasoconstriction and vasodialation of which vessels?
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Arterioles regulate blood flow to individual tissues.
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The rapid pressure increase that occurs when the left ventricle pushes blood into the aorta can be felt as a pressure wave or ________.
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Pulse
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What is the equation used to calculate the strength of the pressure wave?
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Systolic - Diastolic
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List the factors that aid venous return to the heart.
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-One way valves in the veins
-The skeletal muscle pump -Low pressure in the thorax during breathing. |