The radius of the aorta in a test subject determined by MRI is 1.1 cm. At rest, his end diastolic volume is 128 mL and h

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The Radius Of The Aorta In A Test Subject Determined By Mri Is 1 1 Cm At Rest His End Diastolic Volume Is 128 Ml And H 1 (67.89 KiB) Viewed 48 times

The radius of the aorta in a test subject determined by MRI is 1.1 cm. At rest, his end diastolic volume is 128 mL and his end systolic volume is 50 mL. If we start the cardiac cycle at the opening of the mitral valve (recorded as 0 s), the aortic valve in this person opens at 0.56 s and closes at 0.9 s. The entire cycle lasts 1.1 s in this person. The density of blood is 1.055 g mL-1 and its viscosity is 3.0x10-3 Pas. A pascal is one N m2. Using this information, answer the following questions: a) What is the stroke volume? (report in units of mL) 5 pts b) What is the heart rate? (report in units of beats per minute) 5 pts c) What is the cardiac output? (report in units of L/min) 5 pts d) What is the period of ejection? and can any heart sound(s) be heard around this period? If so, at what time point can the heart sound(s) be heard? e) What is the average velocity of blood in the aorta? (report in units of cm/s) 5 pts f) What is the kinetic energy of the ejected blood? (report in units of J, 1 g cm2 52 = 1x10-?)) 5 pts 5 pts