Calculate the increase in pressure needed for maintaining the healthy blood flow through the human artery if the radius decreased from 2.0 x 10-4 to 1.8 x 10-4 cm.
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Calculate the increase in pressure needed for maintaining the healthy blood flow through
the human artery if the radius decreased from 2.0 x 10-4 to 1.8 x 10-4 cm.
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- Explain why mean arterial pressure is not equal to (systolic pressure – diastolic pressure) ÷ 2? Put another way, why is MAP not calculated by taking the traditional arithmetic mean of systolic and diastolic blood pressures?A plastic bag contains physiological saline solution for infusion into the blood stream. If the pressure in your vein is 15 torr, what is the minimum height required for infusing the saline into the vein at a pressure of 20 torr above the pressure in the vein (assume rsal = 1 kg/L). Note: ignore the pressure drop in the %3D injection needle! O 55 cm O 48 cm O 23 cm O 66 cm O 74 cm O 35 cmMedical evidence shows that a small change in the radius of an artery can indicate a large change in blood flow. For example, if one artery has a radius only 5% larger than another, the blood flow rate is 1.22 times as large. Further information is given in the table below. Increase in radius Times greater bloodflow rate 5% 1.22 10% 1.46 15% 1.75 20% 2.07 (a) Use the average rate of change to estimate how many times greater the blood flow rate is in an artery that has a radius 8% larger than another. (Round your answer to three decimal places.)1.364 times greater(b) Explain why if the radius is increased by 8% and then we increase the radius of the new artery by 8% again, the total increase in the radius is 16.64%. x + 8% of xx + 8/100 X xx + 0.08x = 1.08x1.08x + 8% of (1.08x)1.08x + 8/100 X (1.08x)1.08x + 0.0864x = 0.1664x = 16.64% (c) Use parts (a) and (b) to answer the following question: How many times greater is the blood flow rate in an artery that is 16.64%…
- Womersley number (a) of a human aorta is 20 and for the rabbit aorta is 17, the blood density is approximately the same across the species. The values of viscosity were 0.0035 Ns/m² for the human and 0.0040 Ns/m² for the rabbit. The diameter of the aorta is 2.0 cm for the man, and 0.7 cm for the rabbit, estimate the heart rate beats per minute (bpm) for both species.Given the following information, calculate cardiac output: R-R interval = 0.6 second, EDV = 160 mL, ESV = 30 mL * 7.0 L/min 10.0 L/min O 13.0 L/min O 15.0 L/minA 43-year-old woman has congestive heart failure after a myocardial infarction. Before the myocardial infarction, she had a cardiac output of 5 L/min and a right atrial pressure of 0 mm Hg at rest. The solid curve in the graph shows the relationship between right atrial pressure and cardiac output in a normal heart. Which of the following lettered points best represents the change in this relationship after the development of congestive heart failure?
- In the same BP measurement= 120/80, what is the arterial pressure when the left ventricle is at the peak of its contraction? Choices: 120804093Estimate the volume of a human heart (in mL) using the following measurements/assumptions: Blood flow through the aorta is approximately 16.8 cm/s. The diameter of the aorta is approximately 3.0 cm. Assume the heart pumps its own volume with each beat. Assume a pulse rate of 90 beats per minute.The below graph shows changes in several cardiovascular parameters as the result of increased intensity of exercise in a population of untrained individuals. What commonly measured cardiovascular parameters might the curves labeled A, B, and C represent? What are the corresponding units for the y-axis of each measure? For your reference, the two labeled curves represent the Pulmonary Capillary Wedge Pressure (PCWP) and the Central Venous Pressure (CVP), both of which are measured in mmHg.
- Capillary filtration plays a vital role in the exchange of fluids between the circulatory system and tissues A. Consider a scenario where the hydrostatic pressure in the capillary bed is 40 mmHg, the osmotic pressure in the capillary is 25 mmHg, and the interstitial fluid hydrostatic pressure is 5 mmHg. Calculate the net filtration pressure in this situation. B. Determine the direction of fluid movement across the capillary wallGiven: Capillaries are where the magic of gas diffusion happens. Capillaries are approximately 5-10 µm in diameter. Let’s pick an average value of 7.5 µm. A normal value of the diameter of an aortic artery is 15 mm. a. How many capillaries would it take to have the same cross-sectional area as a single aortic artery? b. Assuming constant fluid flow through a single aortic artery and a capillary network with the same cross-sectional area, how will the resistance to flow compare to both? (Answer a and b)on The below graph shows changes in several cardiovascular parameters as the result of increased intensity of exercise in a population of untrained individuals. What commonly measured cardiovascular parameters might the curves labeled A, B, and C represent? What are the corresponding units for the y-axis of each measure? For your reference, the two labeled curves represent the Pulmonary Capillary Wedge Pressure (PCWP) and the Central Venous Pressure (CVP), both of which are measured in mmHg. 200 Right sided cardiac pressures (mmHg) 175 150- A 125 100 75 50 30 20 10 - 0 20 40 60 80 Exercise intensity (% of maximum workload) A B - C PCWP CVP 100 160 150 140 130 120 110 100 30 20 10 B C 1 Hour, 29 Minutes, 18 Seconds
