Admin Table of Contents
- 1 What does resistance to blood flow depend on?
- 2 What are the factors that affect blood flow?
- 3 What is the major determinant of the resistance that blood encounters as it flows through the systemic circulation?
- 4 What are the sources of resistance to blood flow quizlet?
- 5 What is the relationship between resistance and flow?
What does resistance to blood flow depend on?
Resistance to blood flow within a vascular network is determined by the size of individual vessels (length and diameter), the organization of the vascular network (series and parallel arrangements), physical characteristics of the blood (viscosity, laminar flow versus turbulent flow), and extravascular mechanical …
Which factor has the greatest influence on resistance to blood flow?
The three most important factors affecting resistance are blood viscosity, vessel length and vessel diameter and are each considered below.
What are the factors that affect blood flow?
The variables affecting blood flow and blood pressure in the systemic circulation are cardiac output, compliance, blood volume, blood viscosity, and the length and diameter of the blood vessels.
What are the source of resistance to blood flow quizlet?
The three important sources of resistance are blood viscosity, total blood vessel length, and blood vessel diameter. Blood viscosity – “stickiness” of the blood.
What is the major determinant of the resistance that blood encounters as it flows through the systemic circulation?
Blood viscosity – thickness or “stickiness” of the blood. Blood vessel length – the longer the vessel, the greater the resistance encountered.
Which of the following has the greatest influence on blood flow?
Viscosity of Blood It has a viscosity approximately five times greater than water. Viscosity is a measure of a fluid’s thickness or resistance to flow, and is influenced by the presence of the plasma proteins and formed elements within the blood. The viscosity of blood has a dramatic effect on blood pressure and flow.
What are the sources of resistance to blood flow quizlet?
The three important sources of resistance are blood viscosity, total blood vessel length, and blood vessel diameter. Blood viscosity – “stickiness” of the blood. Blood vessel length – the longer the vessel, the greater the resistance encountered.
What controls the flow of blood?
Blood flow through the body is regulated by the size of blood vessels, by the action of smooth muscle, by one-way valves, and by the fluid pressure of the blood itself. Figure 5. Blood pressure is related to the blood velocity in the arteries and arterioles.
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 are the 3 sources of resistance to blood flow?
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.