Cardiac Midterm

Question 1

First phase of cardiac cycle

Answer 1

Atrial systole

Question 2

Second phase of cardiac cycle

Answer 2

Isovolumetric ventricular contraction phase. Ventricles completely closed

Question 3

Third phase of cardiac phase

Answer 3

Ventricular ejection phase. Opens semilunar valves

Question 4

Fourth phase of cardiac cycle

Answer 4

Isovolumetric ventricular relaxation/early diastole. Dicrotic notch causes pressure rise in aorta

Question 5

5 phase of cardiac cycle

Answer 5

Passive ventricular filing

Question 6

Venous return

Answer 6

Amount of venous blood return to the heart

Question 7

Preload

Answer 7

Amount ventricles are stretched by contained blood

Question 8

After load

Answer 8

Back pressure exerted by blood in the large arteries leaving the heart

Question 9

Cardiac output=

Answer 9

Heart rate x stroke volume

Question 10

Ejection fraction

Answer 10

Percentage of blood pumped out of a ventricle with each contraction. Around 50-60%

Question 11

Blood enters atria through 3 veins

Answer 11

Superior vena cava, inferior vena cave, coronary sinus

Question 12

What do AV valves do

Answer 12

Prevent backflow into the heart

Question 13

Right semilunar valve

Answer 13

Pulmonary valve. Connects the right ventricle to pulmonary artery

Question 14

Left semilunar valves

Answer 14

Aortic valve. Connects left ventricle to aorta

Question 15

5 cardiac veins

Answer 15

Great, middle, small, posterior, anterior

Question 16

2 baroreceptors

Answer 16

Carotid sinus, aortic arch