Lecture 31- Starling's Law and Coronary Vasculature

Question 1

What is diastole?

Answer 1

Low pressure chamber filling with blood

Question 2

Is systole or diastole the relaxation period during the heartbeat?

Answer 2

Diastole

Question 3

What is systole?

Answer 3

Ventricular myocardial contraction to eject blood

Question 4

Is systole or diastole the contraction period during the heartbeat?

Answer 4

Systole

Question 5

What are the cardiac cycle steps?

Answer 5

1. Diastolic filling
2. End diastolic volume
3. Isovolumetric contraction
4. Ejection
5. Isovolumetric relaxation
6. End diastolic volume

Question 6

What happens in Isovolumetric contraction?

Answer 6

Pressure builds within chamber

Question 7

What will happen to the sarcomere length as the heart fills stretches with blood?

Answer 7

Sarcomeres increase in length

Question 8

What is stoke volume?

Answer 8

The amount of blood pumped each heartbeat

Question 9

What is stroke volume equation?

Answer 9

Stroke Volume=End Diastolic Volume-End Systolic Volume

SV=EDV-ESV

Question 10

What is cardiac output?

Answer 10

The amount of blood that enters the body per minute

Question 11

What is the cardiac output equation?

Answer 11

Cardiac Output=Stroke Volume x (Heartbeats or Cycles/Minute)

Question 12

What is Starling’s Law?

Answer 12

Increased End Diastolic Volume yields increased stroke volume

Question 13

What is the Blood Flow to the Ventricular Myocardium path?

Answer 13

Coronary artery–>Arterioles–>Capillaries–>Venules–> Coronary sinus–>Right Atrium