Which is more likely to occur a change in blood vessel radius or a change in blood vessel length?
Which is more likely to occur, a change in blood vessel radius or a change in blood vessel length? Blood vessel radius is more likely to change because blood vessel length tends to stay pretty constant. … The longer the vessel length, the greater the resistance, therefore increasing the vessel length decreases flow rate.
How does increasing the flow tube length affect fluid flow?
With increased length, the flow rate decreased as predicted. the blood flow equation). Your answer: While the flow rate is proportional to the length, the flow rate is proportional to the fourth power of the radius.
When the length of the blood vessel increases what also increases?
You scored 100% by answering 4 out of 4 questions correctly. When the length of the blood vessel increases, which of the following also increases? You correctly answered: both friction and surface area. You correctly answered: when we lose weight.
Which of the following describes why the body might require an increase in vessel length?
Blood vessel radius is inversely proportional to resistance and directly proportional to blood flow. Which of the following describes why the body might require an increase in vessel radius? … This is because of contraction or relaxation, foreign matter in blood vessel while length is fixed after growth.
Is it better to adjust heart rate or blood vessel diameter?
Explain whether it would be better to adjust heart rate or blood vessel diameter to achieve blood flow changes at a local level? It would be better to adjust vessel diameter so the heart is not strained.
How does the body increase the blood vessel radius?
How does the body increase the blood vessel radius? You correctly answered: smooth muscle relaxation. You correctly answered: vessel radius.
What is the relationship between blood vessel diameter and blood flow?
In blood vessels, most of the resistance is due to vessel diameter. As vessel diameter decreases, the resistance increases and blood flow decreases. Very little pressure remains by the time blood leaves the capillaries and enters the venules.
Is the relationship between the blood vessel radius and the flow rate linear?
Is the relationship between blood vessel length and blood flow rate directly proportional or inversely proportional. Why? Inversely proportional because w/ increase of length, there is decrease in flow rate and vice versa.
Which of the following is directly proportional to blood flow?
Which of the following is directly proportional to blood ﬂow? You correctly answered: blood vessel radius and pressure gradient.
What is the driving force for blood flow?
Blood flow is driven by the difference in total energy between two points. Although pressure is normally considered as the driving force for blood flow, in reality it is the total energy that drives flow between two points (e.g., longitudinally along a blood vessel or across a heart valve).
How does blood vessel radius affect blood flow?
Mechanics of blood flow
Therefore, blood flow is strongly proportional to the vessel radius. As the radius of the vessel lumen increases (called vasodilation), blood flow increases dramatically, and vice versa .
Why is vessel radius a more important factor?
Why is vessel radius a more important factor in controlling blood flow resistance than vessel length? The radius of the vessel increases blood flow by an exponent of 4.
Which factors would increase blood viscosity?
Increasing red cell hematocrit increases relative viscosity. Note that the increase is non-linear; increased hematocrit causes a disproportionate increase in relative viscosity. Therefore, blood viscosity strongly depends on hematocrit. At a normal hematocrit of 40%, the relative viscosity of blood is about 4.
How do you calculate blood flow?
Because of this, the velocity of blood flow across each level of the circulatory system is primarily determined by the total cross-sectional area of that level. This is mathematically expressed by the following equation: v = Q/A.
Where is the greatest volume of blood found in the body?
Regarding the distribution of blood volume within the circulation, the greatest volume resides in the venous vasculature, where 70-80% of the blood volume is found. For this reason, veins are referred to as capacitance vessels.