If the __________ doubled, how would blood flow change and by how much? a. radius b....
If the __________ doubled, how would blood flow change and by how much?
a. radius
b. blood viscosity
c. vessel length
d. pressure
Homework Answers
Flow (Q) can be expressed using the given equation -
Following changes will occur (provided other factors remains same)
A. Radius
- Flow will increase by 16 times
- Because (2x)4=16x and 4th power of radius is directly proportional to flow
B. Blood viscosity
- Decreases by half (become 1/2 of its original value)
- Blood viscosity is inversely proportional to flow
C. Vessel length
- Decreases by Half (1/2 of its original value)
- Vessel length is inversely proportional to flow
D. Pressure
- Increases and becomes double (2 times it's original value)
- Pressure gradient is directly proportional to flow
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If the __________ doubled, how would blood flow change and by
how much?
a. radius
b....
How its solved 5 A Small blood vessel near the skin has a radius of 10-5...
How its solved
5 A Small blood vessel near the skin has a radius of 10-5 m and length of 1 mm. The pressure drop along the blood vessel is 2.5 Pa. The viscosity of the blood is 2.5 x 10-3 Pa.s. The volume flow rate of blood through this blood vessel is A) 4.17 x 10-4m3/s B) 1.83 x 10-15m3/s C) 3.93 x 10-15m3/s D) 6.25 x 10-"m3/s
Which of the following changes would cause the greatest increase in resistance? a. Doubling the radius...
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1) Explain why changing blood viscosity would or would not be a reasonable method for the...
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In hemodynamics, blood flow through the cardiovascular system can be modeled as an electric circuit in...
In hemodynamics, blood flow through the cardiovascular system
can be modeled as an electric circuit in which the blood serves as
electricity, the blood vessels as resistive wires, and the heart as
a battery (see Figure 1).
Figure 1 Cardiovascular circuit model
Ohm’s law states that the voltage drop ΔV across each element,
the current I flowing through it, and its electrical
resistance R are related by ΔV = IR. In a blood vessel, pressure
difference between one vessel and...
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Consider a 4-mm diameter blood vessel and two 2-mm diameter blood vessels. Assuming pressure, viscosity, and...
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How its solved
5 A Small blood vessel near the skin has a radius of 10-5 m and length of 1 mm. The pressure drop along the blood vessel is 2.5 Pa. The viscosity of the blood is 2.5 x 10-3 Pa.s. The volume flow rate of blood through this blood vessel is A) 4.17 x 10-4m3/s B) 1.83 x 10-15m3/s C) 3.93 x 10-15m3/s D) 6.25 x 10-"m3/s
21.3 HEMODYNAMICS: FACTORS AFFECTING BLOOD FLOw 815 proteins in plasma. The higher the blood's viscoily.the higher the resistance. Any condition that increases the visoityo ch as dehydration or polycythemia (an onosual -A hlood cellis), thus increases blood pressun blood presssure has dropped to about in blood cells, dac to a whose weight is 160 pounds has a total length of blood vessels equal to 70,000 miles. If he ains 1 pound of fat, his fat tissue will grow an extra...
In hemodynamics, blood flow through the cardiovascular system
can be modeled as an electric circuit in which the blood serves as
electricity, the blood vessels as resistive wires, and the heart as
a battery (see Figure 1).
Figure 1 Cardiovascular circuit model
Ohm’s law states that the voltage drop ΔV across each element,
the current I flowing through it, and its electrical
resistance R are related by ΔV = IR. In a blood vessel, pressure
difference between one vessel and...
6: (a) Use the scaling laws to estimate the change of volumetric flow and pressure drop per unit length in a circular tube if the radius of the tube is reduced by a factor of 10. The pressure drop in a capillary tube is given by AP- 8uVavg.Lia. Here, L length of tube, a is the radius, g is the average speed of fluid and u is the viscosity). (b) Evaluate the resistance per unit length (R/L) for water flow...
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