Exam 2 Cardiac Cycle/output/hemodynamics

Question 1

The heart is responsible for ____ through the circulatory system and is essentially a ____

Answer 1

Blood flow; pump

Question 2

Right heart pumps blood through the _____, termed ____ circulation

Answer 2

Lungs; pulmonary

Question 3

____ delivers deoxygenated blood to the lungs and returns oxygenated blood back to the left atrium

Answer 3

Right ventricle

Question 4

Left heart pumps blood through the ______, termed _____ circulation

Answer 4

Peripheral organs; peripheral/systemic

Question 5

_____ pumps blood to the body and then deoxygenated blood back to the right atrium

Answer 5

Left ventricle

Question 6

List the pathway of blood flow for pulmonary circulation

Answer 6

Right atrium, tricuspid valve, right ventricle, pulmonary valve, pulmonary artery, lungs

Question 7

List the pathway of blood flow for systemic circulation

Answer 7

Pulmonary veins, left atrium, mitral valve, left ventricle, aortic valve, aorta

Question 8

Deoxygenated blood enters the heart through what vessels?

Answer 8

Superior and inferior vena cava

Question 9

The pulmonary valve and aortic valve are _____ valves

Answer 9

Semilunar

Question 10

The tricuspid and bicuspid (mitral) valves are _____ valves

Answer 10

AV

Question 11

_____ is the sequence of events occurring in the heart during a single heart beat

Answer 11

Cardiac cycle

Question 12

What is the period of ventricular contraction and blood ejection?

Answer 12

Systole

Question 13

What is the period of ventricular relaxation and filling with blood?

Answer 13

Diastole

Question 14

At a heart rate of 75 beats per minute, one cardiac cycle period is only ____ sec

Answer 14

0.8 sec (0.3 in systole, 0.5 in diastole)

Question 15

Cycle of cardiac contraction and relaxation results in changes in ______ in the cardiac chambers

Answer 15

Pressure and volume

Question 16

What are the four phases of the cardiac cycle?

Answer 16

1. Diastolic filling
2. Isovolumetric contraction
3. Ejection
4. Isovolumetric relaxation
   (phases are separated according to mechanical events in the cardiac cycle)

Question 17

Systole occurs during phases ____ of the cardiac cycle. Diastole occurs during phases _____

Answer 17

2 and 3; 1 and 4