AP2 Exam 1 questions-- Sameer Verma

Question 1

If a person has a Cardiac Output (CO) of 5600ml/min and the heart rate is 70 beats/mins. what is the systolic volume (ESV) if the end diastolic volume (EDV) is 150 ml/beat.
a. 90ml/beat b. 80ml/beat c. 70ml/beat d. 60ml/beat

Answer 1

SV=EDV-ESV =150-ESV
CO= HR x SV
5600=70 x (150-ESV)
5600/70 =150-ESV
80=150-ESV
80-150= -ESV
-70= -ESV ESV=70ml/beat

Question 2

What is the main function of mitral valve?
a. to increase the pressure inside the left atrium during systole
b. to prevent a drop in pressure in the Aorta during diastole
c. to prevent backflow from left ventricle to left atrium during systole
d. to add additional blood from left atrium to left ventricle during atrial systole

Answer 2

c. to prevent backflow from left ventricle to left atrium during systole