Cardiac Output & Venous Return & Control of blood flow

Question 1

in the CO/venous return graph, how do you find CO/VR?

Answer 1

at the intersection of the lines, straight over to y-axis

Question 2

in the CO/venous return graph, how do you find mean systemic filling pressure?

Answer 2

where the line intersects the x-axis

Question 3

what is the normal plateau level of a cardiac function curve?

Answer 3

13L/min

Question 4

what decreases the plateau level of a cardiac function curve?

Answer 4

cardiac failure

Question 5

what increases the plateau level of a cardiac function curve?

Answer 5

sympathetic stimulation

Question 6

what percent of total cardiac output goes to the heart itself?

Answer 6

5%

Question 7

what increases local blood flow?

Answer 7

increased adenosine or decreased O2

Question 8

which is the most potent vasodilator: increased adenosine or decreased O2

Answer 8

adenosine

Question 9

what kind of heart has the best blood supply and why?

Answer 9

• well conditioned
• local control of blood flow is more important than ANS

Question 10

what effect does exercise have on the coronary system?

Answer 10

dilates it (increased adenosine)

Question 11

when does the heart receive blood flow?

Answer 11

only during diastole