Cardiovascular system part 1

Question 1

What is the thoracic cavity that the heart is situated in?

Answer 1

mediastinum

Question 2

Coronary circulation involves the delivery of oxygenated blood to the?

Answer 2

heart

Question 3

What do the left and right coronary arteries receive blood from?

Answer 3

aorta

Question 4

What is the most superficial layer of the pericardial sac?

Answer 4

fibrous pericardium

Question 5

What is the function of valves in the heart?

Answer 5

prevent backflow of blood through the heart

Question 6

What muscle, present in the ventricles, anchor the AV valves by tendon-like chords called chordae tendinae?

Answer 6

papillary muscles

Question 7

What is found between the visceral and parietal pericardium?

Answer 7

pericardial fluid

Question 8

Blood in the right ventricle arrived from the?

Answer 8

right atrium

Question 9

What is the visceral pericardium AKA?

Answer 9

epicardium

Question 10

Does the right or left ventricle have a thinner myocardial layer?

Answer 10

right ventricle

Question 11

What surface groove separates the right and left ventricles?

Answer 11

interventricular sulcus

Question 12

Both the left and right atria receive blood from?

Answer 12

veins

Question 13

The pulmonary circuit involves blood flow from the heart to the?

Answer 13

lungs

Question 14

The right side of the heart receives _______ blood from the _______ circuit

Answer 14

deoxygenated; systemic

Question 15

Blood on the right side of the heart is _______ blood and is pumped into the ________ circuit

Answer 15

deoxygenated; pulmonary

Question 16

Which type of capillary would be least likely to allow substances to enter or exit the blood due to tight junctions that join the endothelial cells?

Answer 16

continuous

Question 17

Which valve is situated between the left atrium and the left ventricle?

Answer 17

mitral valve

Question 18

What valve prevents backflow of blood from the right ventricle into the right atrium?

Answer 18

tricuspid valve

Question 19

Which vessel is guarded by a semilunar valve at its base?

Answer 19

pulmonary trunk

Question 20

Which vessel does NOT return blood to the right atrium of the heart?

Answer 20

pulmonary vein

Question 21

Which vessel carries oxygenated blood?

Answer 21

pulmonary vein

Question 22

Which part of the ECG would most be affected by abnormally slow depolarization of the ventricles?

Answer 22

QRS wave

Question 23

Which part of an ECG can be used to measure heart rate?

Answer 23

R-R interval

Question 24

The degree of stretch experienced by the sarcomeres in the ventricle cells before they contract is called?

Answer 24

preload

Question 25

What characteristic differentiates cardiac muscle cells from skeletal muscle cells?

Answer 25

intercalated discs

Question 26

Autorhythmicity in the heart is the responsibility of what groups of cells?

Answer 26

cardiac pacemaker cells

Question 27

A damaged AV bundle or AV node will primarily affect the length of the?

Answer 27

P-R interval

Question 28

What function related to action potentials do intercalated discs serve in the heart?

Answer 28

they allow action potentials to spread from cell to cell

Question 29

Predict the position of the heart valves during the ventricular ejection phase?

Answer 29

AV valves shut while semilunar valves are open

Question 30

The volume of blood pumped by each ventricle in one heartbeat is known as?

Answer 30

stroke volume

Question 31

Inotropic agents affect?

Answer 31

contractility

Question 32

Which hormone decreases cardiac output by decreasing blood volume and preload?

Answer 32

ANP (atrial natriuretic peptide)

Question 33

Calculate the stroke volume

Systolic 50 mL
Diastolic 110 mL

Answer 33

60 mL