Cardiac Cycle

Question 1

How do the AV valves behave in daisotle?

A. AV valves (tricuspid, mitral) close
B. AV valves (pulmonic, aortic) open
C. AV valves (tricuspid, mitral) open
D. AV valves (pulmonic, aortic) close

Answer 1

C. AV valves (tricuspid, mitral) open

Question 2

What happens during S3?

A. Pressure in the ventricle exceeds aortic pressure
B. Closure of the semilunar valves (aortic and pulmonic)
C. Blood pours from the atria into the ventricles
D. Atrial Contraction (Atrial kick)

Answer 2

C. Blood pours from the atria into the ventricles

Question 3

What does the blood do in S3?

A. Blood ejection into the aorta and pulmonary artery
B. Active filling/ presystole
C. Protodiastolic/ passive filling
D. Ventricle walls contract

Answer 3

C. Protodiastolic/ passive filling

Blood pores from the atria into the ventricles during S3

Question 4

What happens during S4?

A. Blood ejection into the aorta and pulmonary artery
B. Active filling/ presystole
C. Protodiastolic/ passive filling
D. Ventricle walls contract

Answer 4

B. Active filling/ presystole

Atrial contraction (atrial kick)

Question 5

S2 is louder than S1. True or false?

Answer 5

False

Question 6

What happens during S1?

A. AV valves (mitral, tricuspid) open
B. AV valves (mitral, tricuspid) close
C. Semilunar valves (mitral, tricuspid) close
D. Semilunar valves (aoritc, pulmonic) open

Answer 6

B. AV valves (mitral, tricuspid) close

Question 7

What is isometric contraction?

A. Arterial walls contract
B. Blood pores from the atria into the ventricles
C. Active filling/ presystole
D. Ventricle walls contract

Answer 7

D. Ventricle walls contract

Question 8

What happens during isometric contraction?

A. Blood pours from the atria into the ventricles
B. Atrial contraction
C. Ventricles relax
D. Pressure in the ventricle exceeds aortic pressure

Answer 8

D. Pressure in the ventricle exceeds aortic pressure

Question 9

What happens when pressure in the ventricle exceeds aortic pressure?

A. Blood pours from the atria in to the ventricles
B. Atrial contraction begins causing active filling
C. Ventricle walls contract
D. Blood ejection into aorta and pulmonary artery

Answer 9

D. Blood ejection into aorta and pulmonary artery
- Really both C and D

Question 10

What happens during S2?

A. Closure of the AV valves (mitral, tricuspid)
B. AV valves (mitral, tricuspid) open
C. Semilunar valves (aortic, pulmonic) open
D. Semilunar valves (aortic, pulmonic) close

Answer 10

D. Semilunar valves (aortic, pulmonic) close