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8. Heart
Hemodynamics overview
6
Medical
Graduate
11/06/2012

Additional Medical Flashcards

 


 

Cards

Term
Individual blood vessel diameter and mean blood flow velocity
Definition
Larger diameter = higher velocity
-Difference b/t arteries and veins
Term
Total cross sectional area
Definition
-Capillaries are smallest individual x-sectional
-Billions of them
-Largest total x-sectional area
Term
Blood volume distribution
Definition
Greatest in veins-->venous resovoire
-Low resistance in veins-->lack of recoil, high compliance
Term
Total peripheral resistance
Definition

Greatest in arterioles due to vasoactivity

-Resistance=force that regulates flow

Term
Arterioles Vasoactivity- respond to:
Definition
- Neurological signal
- Hormonal signal
- Local signal
Cause constriction/dilation
Term
Mean blood pressure
Definition

Greatest in larger arteries- continually drops lower to veins 

-High pressure shoots blood out of heart

-Low pressure drops blood back into the heart

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