Lecture 3: mechanical B6

Question 1

How does fluid move?

Answer 1

High pressure to low pressure

Will flow until pressure is equalized

Question 2

Blood is non-compressible, what does this mean?

Answer 2

Compression will raise pressure without affecting volume

Question 3

What are the names of valves in heart and what do they do?

Answer 3

2 Atrioventricular valves
-Mitral between LA and LV
-Tricuspid between RA and RV
2 semilunar valves
-Pulmonary between RV and PA
-Aortic between LV and Aorta

Question 4

Period of relaxation and filling of blood.

Answer 4

Diastole

Question 5

What are the 3 parts of diastole?

Answer 5

Isovolumic relaxation- pressure drops, no change in volume
Rapid filling
Reduced filling

Question 6

Period of force generation.

Answer 6

Systole

Question 7

What are the 3 parts of systole?

Answer 7

Isovolumic contraction- pressure rises, no volume change
Rapid Ejection
Reduced ejection

Question 8

If ventricle is diastole, Atria has contracted what valve closes.

Answer 8

Mitral valve closes

Question 9

What are 3 ways to measure preload?

Answer 9

• Volume in ventricle is End-Diastolic Volume (EDV)
• Pressure is End-Diastolic Pressure (EDP)
• Venous return (VR)

Question 10

Volume left in ventricle after it is done contracting.

Answer 10

End-systolic volume (ESV)

Question 11

True/False: Heart spends more time in systole than it does systole.

Answer 11

True