W4/L1: Cardiac function

Question 1

For a given volume of blood, what does pressure depend on?

Answer 1

Compliance of the wall

Active tension in the wall

Question 2

Which ventricle has thicker walls?

Answer 2

Left

Question 3

Which ventricle can generate greater forces?

Answer 3

Left

Question 4

Afterload is:

Answer 4

a pressure load imposed by aterial hypertension & LV outflow obstruction

Question 5

Preload is:

Answer 5

a volume load imposed by increased venous return

Question 6

What will increased stroke volume and why?

Answer 6

Increased EDV, due to the Frank-Starling relationship: more stretch = more tension

Question 7

What is the first heart sound produced by?

Answer 7

Closing of the mitral & tricuspid valves

Question 8

What is the 2nd heart sound produced by?

Answer 8

Closing of the aortic and pulmonary valves

Question 9

What is the symbol for the 1st heart sounds?

Answer 9

S1

Question 10

When do you hear the 1st heart sound?

Answer 10

End of diastole

Question 11

When do you hear the 2nd heart sound?

Answer 11

End of systole