Heart

Question 1

Conduction system of heart order

Answer 1

SA node, AV node, AV bundle, bundle branches, Purkinje fibres

Question 2

The semilunar valve are open due to

Answer 2

Ventricular systole

Question 3

When the chambers relax and fill with blood

Answer 3

Diastole

Question 4

When the chambers contract and eject blood

Answer 4

Systole

Question 5

When are AV valves open?

Answer 5

Beginning of each cycle

Question 6

When are pulmonary and aortic valves closed

Answer 6

Same time as the AV valves are open

Question 7

Atrial depolarization wave

Answer 7

P

Question 8

Ventricular depolarization

Answer 8

QRS complex

Question 9

QRS complex masks what

Answer 9

The atria repolarization and relaxing

Question 10

When is the AV valves closed

Answer 10

Ventricular systole

Question 11

When are pulmonary and aortic valves open

Answer 11

When the pressure in the ventricles is higher than the pulmonary trunk and aorta

Question 12

When do ventricles repolarize

Answer 12

During diastole and T wave

Question 13

When do aortic and pulmonary valves close

Answer 13

During ventricular diastole

Question 14

What happens when intraventricular pressure falls below atria pressure?

Answer 14

AV valves open and cycle starts again

Question 15

Inotropes

Answer 15

Affect contraction strength

Question 16

Chronotropes

Answer 16

Affect heart rate

Question 17

Preload

Answer 17

How full the heart is before pumping out blood

Question 18

Contractility

Answer 18

How strong the contractions are

Question 19

After load

Answer 19

How hard it is to pump blood out of

Question 20

Stroke volume

Answer 20

How much blood comes out of the heart