homework assignment #2

Question 1

Blood returning to the heart from the pulmonary circuit first enters the __________.

Answer 1

left atrium

Question 2

The ________ valve prevents backward flow into the left atrium.

Answer 2

bicuspid

Question 3

The auricle is the __________.

Answer 3

ear-like extension of the atrium

Question 4

The coronary sulcus is a groove that

Answer 4

marks the border between the atria and ventricles.

Question 5

The superior portion of the heart where major blood vessels enter and exit is the

Answer 5

base

Question 6

Muscular ridges on the inner surface of the ventricles are called

Answer 6

tribieculae carnae

Question 7

The inferior point of the heart is called the

Answer 7

appex

Question 8

Oxygen is added to blood as it flows through the ________ circuit.

Answer 8

pulmonary

Question 9

Blood flowing in the vena cava will next enter the __________.

Answer 9

right atrium

Question 10

The interventricular sulci and coronary sulcus

Answer 10

• contain veins
• contain fat
• are grooves on the surface of the heart
• contain arteries

Question 11

The right atrium receives blood from the

Answer 11

• superior vena cava
• inferior vena cava
• coronary sinus
• systemic circuit

Question 12

The blood vessel that branches to form a right common carotid and a right subclavian artery is the

Answer 12

brachiocephalic artery

Question 13

The heart is actually (one, two, or three) pumps?

Answer 13

two pumps

Question 14

Which chamber receives blood from the superior and inferior vena cavae?

Answer 14

right atrium

Question 15

Which heart chamber receives blood from the pulmonary veins?

Answer 15

left atrium

Question 16

Which heart chamber pumps unoxygenated blood out the pulmonary trunk?

Answer 16

right ventricle

Question 17

Which chamber pumps oxygenated blood out the aorta to the systemic circuit?

Answer 17

left ventricle

Question 18

The ________ is shared by the two ventricles.

Answer 18

interventicular septum

Question 19

Blood leaves the right ventricle by passing through the

Answer 19

pulmonary valve

Question 20

The heart lies within the ________ cavity.

Answer 20

pericardial

Question 21

The pulmonary semilunar valve prevents backward flow into the

Answer 21

right ventricle

Question 22

Compared to the right ventricle, which of these statements about the left ventricle is false?

Answer 22

it ejects more blood

Question 23

The right ventricle pumps blood to the

Answer 23

right and left lungs

Question 24

The visceral pericardium is the same as the

Answer 24

epicardium

Question 25

The marginal branch and posterior interventricular branch are branches of the

Answer 25

right coronary artery

Question 26

Contractions of the papillary muscles

Answer 26

prevent the atrioventicular valves from reversing the atria

Question 27

The ________ circuit carries blood to and from the lungs.

Answer 27

pulmonary

Question 28

The earlike extension of the atrium is the

Answer 28

auricle

Question 29

Which of these organs is not found in the mediastinum?

Answer 29

lung

Question 30

The left ventricle pumps blood to the

Answer 30

aorta

Question 31

The coronary sinus drains the ________ into the ________.

Answer 31

cardiac veins; right atrium

Question 32

If the connection between the SA node and AV node becomes blocked

Answer 32

the ventricles will beat more slowly

Question 33

The cusps (leaflets) of atrioventricular valves attach directly to

Answer 33

chordae tendineae

Question 34

The bicuspid or mitral valve is located

Answer 34

between the left atrium and left ventricle

Question 35

The fusion of the brachiocephalic veins forms the

Answer 35

superior vena cava

Question 36

The pulmonary trunk carries __________ blood __________ the lung.

Answer 36

deoxygenated; to

Question 37

An equivalent term for epicardium is

Answer 37

visceral pericardium

Question 38

Pulmonary veins carry blood to the

Answer 38

left atrium

Question 39

The pulmonary arteries carry blood to the

Answer 39

lungs

Question 40

Which of the following statements about the pulmonary circuit is FALSE?

Answer 40

the right and left pulmonary arteries carry oxygenated blood

Question 41

The ________ carry blood toward the heart.

Answer 41

veins

Question 42

Blood returning to the heart from the systemic circuit first enters the

Answer 42

right atrium

Question 43

The ________ carry blood away from the heart.

Answer 43

arteries

Question 44

The great and middle cardiac veins drain blood into the

Answer 44

coronary sinus

Question 45

The property of heart muscle to contract in the absence of neural or hormonal stimulation is called

Answer 45

automaticity

Question 46

The __________ valve prevents backward flow of blood into the left ventricle.

Answer 46

aortic

Question 47

Branches off the aortic arch include the

Answer 47

brachiocephalic trunk, left subclavian artery, and left common carotid artery

Question 48

The function of an atrium is to

Answer 48

collect blood then pump it to the ventricle

Question 49

The ________ covers the outer surface of the heart.

Answer 49

epicardium