Artial And Venous Blood Flow Flashcards
Give some characteristics of veins
Thin walled structures
Volume of blood unstressed volume
Supplied by a1 adrenergic receptors
What is the highest pressure measured during a cardiac cycle?
Systolic pressure
What are the components of systemic circulation?
Left Heart
Systemic arteries
Capillaries
Veins
What are the components of pulmonary circulation?
Right heart
Pulmonary arteries
Capillaries
Veins
Give some characteristics arterioles
Smooth muscle structures
Site of Highest resistance in vasculature
Has a1 receptors in vasculature
B2 receptors in skeletal muscle
Give some characteristics capillaries.
Layer of endothelium cells.
Gaseous exchange:
Tissue- nutrients, water, gases and solutes w/ blood
Lungs - blood and alveolar gas
How do you describe the blood flow in the CVS, if the Renolds number is <2000 and >2000?
<2000, Laminar flow
>2000, Turbulent flow
Describe the relationship between blood viscosity, blood velocity and Renolds number in a person with anemia.
An decrease in blood viscosity -> increase in Renolds number, turbulent blood flow
A increase in blood velocity > increase in Renolds number, turbulent blood flow
Describe the relationship between blood diameter, blood velocity and Renolds number in a person with thrombus
An decrease in blood diameter will cause an increase in blood velocity and cause a increase in Renolds number, turbulent blood flow.
State the effect of Aortic stenosis on systolic, pulse and mean pressure.
Aortic stenosis is caused by the narrowing of the aortic valve therefore, it decreases stroke volume:
— decreases systolic pressure
— decreases pulse pressure
— decreases mean pressure.
State the effect of Arteriosclerosis on systolic, pulse and mean pressure.
Arteriosclerosis is the hardening of the blood vessel wall therefore, it decreases arterial compliance and increases SV, thus:
— Increases systolic, mean and pulse pressure.
Know the two equations of mean arterial pressure.
- MAP= DP + 1/3 PP
- MAP= 1/3 SYSP + 2/3 DP
