What is the relationship between blood flow blood pressure and resistance?
In the arterial system, as resistance increases, blood pressure increases and flow decreases. In the venous system, constriction increases blood pressure as it does in arteries; the increasing pressure helps to return blood to the heart.
What factors contribute to the blood flow and resistance?
There are three primary factors that determine the resistance to blood flow within a single vessel: vessel diameter (or radius), vessel length, and viscosity of the blood. Of these three factors, the most important quantitatively and physiologically is vessel diameter.
What is the relationship between resistance and flow?
Because flow and resistance are reciprocally related, an increase in resistance decreases flow at any given ΔP. Also, at any given flow along a blood vessel or across a heart valve, an increase in resistance increases the ΔP.
What is the relationship between pressure flow and resistance quizlet?
Which is the correct relationship among pressure, flow, and resistance? Flow is directly proportional to change in pressure and inversely proportional to resistance.
What is resistance to flow?
6 Summary and research directions. Flow resistance is what stops a river from accelerating as it flows downhill. Greater resistance implies deeper and slower flow at a given discharge, or lower velocity and discharge for a given depth. Resistance differs between reaches, and varies with discharge within a reach.
How does blood pressure affect blood flow?
High blood pressure can damage your arteries by making them less elastic, which decreases the flow of blood and oxygen to your heart and leads to heart disease. In addition, decreased blood flow to the heart can cause: Chest pain, also called angina.
How does blood flow affect blood pressure?
What is the relationship between blood pressure and blood flow quizlet?
If blood pressure increases, blood flow increases; if peripheral resistance increases, blood flow decreases.
What is the relationship between blood flow and a pressure gradient quizlet?
– Pressure gradient that drives blood flow through given organ is called perfusion pressure. If this increases, blood flow increases and arteriolar pressure rises, stretches walls. In arterioles with stretch-sensitive smooth muscle, fibers contract and increases resistance and decreases blood flow.
What is the relationship between resistance and flow rate?
What does pressure resistance mean?
[′presh·ər ri‚zis·təns] (fluid mechanics) In fluid dynamics, a normal stress caused by acceleration of the fluid, which results in a decrease in pressure from the upstream to the downstream side of an object acting perpendicular to the boundary. Also known as pressure drag.
Which is the correct relationship between pressure flow and resistance quizlet?
What is the relationship between resistance and blood flow?
Resistance – is opposition to flow and is a measure of the amount of friction blood encounters as it passes through the vessels. Blood flow (F) is directly proportional to the difference in blood pressure (ΔP) between two points in the circulation, that is, the blood pressure, or hydrostatic pressure, gradient.
How do cardiac output and peripheral resistance relate to blood pressure?
Cardiac output (blood flow of the entire circulation) and peripheral resistance relate to blood pressure. •blood pressure varies directly with CO and R.Additionally, blood pressure varies directly with blood volume because CO depends on blood volume (the heart can’t pump out what doesn’t enter its chambers).
What are the factors that affect blood pressure and blood flow?
Blood pressure, blood flow, and resistance. Blood flow is determined by the pressure difference and the resistance of the vessel. Pressure difference is the driving force for blood flow, and resistance is impediment to flow.
What is the relationship between pressure difference and resistance?
Pressure difference is the driving force for blood flow, and resistance is impediment to flow. The relationship of flow (Q), resistance (R), and pressure difference (∆P) is expressed by Ohm’s law (Q=∆P/R).