Cardiac Cycle

Question 1

What is the cardia cycle

Answer 1

Period of contraction (systole) and relaxation (diastole)

Question 2

1st period of systole

Answer 2

Blood returning to the heart flows into the atria and ventricles

Question 3

2nd period of systole

Answer 3

When ventricles and 70% full, atria will contract

Question 4

What is atria contracting called

Answer 4

Atrial systole

Question 5

Increasing pressure in the atria does what?

Answer 5

Forces blood into ventricles

Question 6

3rd stage of systole

Answer 6

As ventricles contract, ventricular pressure exceeds atrial pressure and AV valves close to prevent back flow

Question 7

AV vales closing

Answer 7

first heart sound

Question 8

AV stands for

Answer 8

AtrioVentricular

Question 9

4th stage of systole

Answer 9

With both sets of heart valves closed, pressure rapidly builds in the contracting ventricles

Question 10

Isovolumetric contraction

Answer 10

contracting ventricles

Question 11

5th stage of systole

Answer 11

When ventricular pressure exceeds blood pressure in the aorta, the aortic valve opens and blood is released into the aorta

Question 12

1st stage diastole

Answer 12

As blood exits the ventricle and travels down the aorta, ventricular pressure falls

Question 13

2nd stage diastole

Answer 13

When ventricular pressure drops below aortic pressure, the aortic valve closes to prevent back flow

Question 14

Aortic valves closing

Answer 14

(second heart sound)

Question 15

3rd stage diastole

Answer 15

Ventricular pressure drops below the atrial pressure. AV valve opens. Blood can flow from atria to ventricle

Question 16

Throughout the cycle aortic pressure remains high? True or false

Answer 16

True. Muscle and elastic fibres in the artery wall maintain blood pressure

Question 17

Phase 1 of Cardiac Cycle

Answer 17

Atrial Contraction (blood pushed into ventricles)

Question 18

2nd phase of Cardiac Cycle

Answer 18

Isovolumetric contraction (blood pushed into valves)