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Sounds of the aortic valve are heard in the second intercostal space at the right sternal margin.

A) True
B) False

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Which of the following statements about fetal heart development is False?


A) The four heart chambers first develop during the third trimester.
B) The heart begins as a pair of tubes in the midline of the thorax.
C) The heart develops from mesodermal mesenchyme.
D) The two atria are connected by a foramen ovale until birth.

E) A) and B)
F) A) and D)

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Heart valve with two cusps.


A) mitral valve
B) pulmonary semilunar valve
C) aortic semilunar valve
D) fossa ovalis
E) atrioventricular bundle

F) A) and B)
G) A) and C)

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Coronary artery that supplies the left atrium.


A) circumflex artery
B) left anterior descending artery
C) marginal artery
D) posterior descending artery
E) pulmonary artery

F) All of the above
G) B) and E)

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Of the following heart chambers, which is most affected by hypertrophic cardiomyopathy?


A) right atrium
B) right ventricle
C) left ventricle
D) left atrium

E) A) and B)
F) A) and C)

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The first heart sounds of "lub-dup" are produced by the closing of the right and left ________.

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atrioventr...

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To listen for the aortic semilunar valve on the chest wall, one would place the stethoscope in the


A) second intercostal space to the right of the sternum.
B) second intercostal space to the left of the sternum.
C) fifth intercostal space inferior to the left nipple.
D) fifth right intercostal space.

E) C) and D)
F) A) and C)

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Enlargement of the heart with progressive decline in pumping efficiency.


A) cardiac tamponade
B) congestive heart failure
C) heart block
D) myocardial infarction
E) hypertrophic cardiomyopathy

F) B) and E)
G) A) and E)

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Destruction of which structure will result in electrical signals traveling to only one ventricle?


A) atrioventricular bundle
B) bundle branch
C) internodal pathway
D) sinoatrial node

E) C) and D)
F) B) and C)

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The right ventricle pumps blood into which vessel?


A) the aorta
B) the pulmonary vein
C) the pulmonary trunk
D) the superior vena cava

E) B) and C)
F) A) and D)

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   Figure 19.2 Use the diagram above to answer the following questions. -Identify the letter that indicates the thicker myocardial layer of the left ventricle. A)  A B)  B C)  C D)  D E)  E Figure 19.2 Use the diagram above to answer the following questions. -Identify the letter that indicates the thicker myocardial layer of the left ventricle.


A) A
B) B
C) C
D) D
E) E

F) A) and B)
G) A) and E)

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Cells of the conducting system located between the AV node and bundle branches.


A) trabeculae carneae
B) pectinate muscles
C) crista terminalis
D) papillary muscles
E) atrioventricular bundle

F) B) and D)
G) A) and B)

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The walls of the ________ are thicker so as to push blood through the systemic circuit.

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Describe how the arrangement of cardiac muscle bundles "squeeze" the blood from the heart.

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The muscle bundles of the atria are circ...

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The right atrium receives blood from the superior vena cava, inferior vena cava, and ________.

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Pericarditis can lead to all of the following except


A) excess fluid in the pericardial cavity.
B) pericardial friction rub.
C) adhesions.
D) a myocardial infarction.

E) C) and D)
F) A) and B)

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Cells of the subendocardial conducting network


A) are larger and have fewer myofilaments than other cardiac cells.
B) are nonconducting cells that electrically insulate the bundle branches of the interventricular septum.
C) are pacemaker cells located in the SA node that initiate each heartbeat.
D) are sensory cells that monitor the stretch of the myocardium to prevent overexpansion by high blood pressure.

E) A) and D)
F) B) and D)

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