Additional Notes Module 4: Blood Flow, Blood Pressure, and Resistance Flashcards
____ is the movement of blood through a vessel, tissue, or organ.
Blood flow
The slowing or blocking of blood flow is called ____
resistance
_____ is the force that blood exerts upon the walls of the blood vessels or chambers of the heart.
Blood pressure
The components of ______ include systolic pressure, which results from ventricular contraction, and diastolic pressure, which results from ventricular relaxation.
blood pressure
______ is the difference between systolic and diastolic measures, and mean arterial pressure is the “average” pressure of blood in the arterial system, driving blood into the tissues.
Pulse pressure
____, the expansion and recoiling of an artery, reflects the heartbeat.
Pulse
The variables affecting blood flow and blood pressure in the ______ are cardiac output, compliance, blood volume, blood viscosity, and the length and diameter of the blood vessels.
systemic circulation
In the _____, vasodilation and vasoconstriction of the arterioles is a significant factor in systemic blood pressure: slight vasodilation greatly decreases resistance and increases flow, whereas slight vasoconstriction greatly increases resistance and decreases flow.
arterial system
In the arterial system, as resistance increases, blood pressure increases and flow _____.
decreases
In the _____, constriction increases blood pressure as it does in arteries; the increasing pressure helps to return blood to the heart.
venous system
In addition, constriction causes the vessel lumen to become more ____, decreasing resistance and increasing blood flow.
rounded
________ , while less important than arterial vasoconstriction, works with the skeletal muscle pump, the respiratory pump, and their valves to promote venous return to the heart
Venoconstriction
