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Flashcards in EXAM III Final Deck (106)
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91

What is the function of the interatrial septum primum?

Where does it grow towards and what does it separate?

Grows downward from cephalic wall of single atrium to endocardial cushion

Separates atrium into left and right chambers

92

List the 3 openings in the partition of the atrial partitioning

1. Interatrial foramen primum - right to left atrial shunt; space b/w leading edge of septum primum and endocardial cushion

2. Interatrial foramen secundum - forms at cephalic end of septum primum thru apoptosis; continues the right to left atrial shunt after the foramen primum closes with the fusion of the septum primum w/ the endocardial cushion

3. Foramen ovale - space within septum secundum; right to left atrial shunt

93

Which opening in the partition of the atria is the space formed within the septum secundum and is a right to left atrial shunt?

a. Interatrial foramen primum
b. Interatrial foramen secundum
c. Foramen ovale
d. Endocardial cushion

Foramen ovale

94

Which opening in the partition of the atria is the space between the leading edge of the septum primum and the endocardial cushion and is a right to left atrial shunt?

a. Interatrial foramen primum
b. Interatrial foramen secundum
c. Foramen ovale
d. Endocardial cushion

Interatrial foramen primum

95

Which opening in the partition of the atria forms at the cephalic end of the septum primum through apoptosis and continues the right to left atrial shunt after the foramen primum closes with the fusion of the septum primum with the endocardial cushion?

a. Interatrial foramen primum
b. Interatrial foramen secundum
c. Foramen ovale
d. Endocardial cushion

Interatrial foramen secundum

96

What is the fate of the left umbilical vein?

Hepatic portal vein

97

Which structure permits oxygenated blood to bypass the capillary network of the liver in the fetus?

a. Ductus venosus
b. Umbilical vein
c. Hepatic portal vein
d. Ductus arteriosus

Ductus venosus

98

The internal carotid artery arises from aortic arch number:

a. 1
b. 2
c. 3
d. 4
e. 5

Aortic arch 3

99

The common carotids are derived from the ventral aortae between which two aortic arches?

a. first and second
b. second and third
c. third and fourth
d. fourth and fifth

Third and fourth

100

External carotids are cranial extensions of the paired ventral aortae cranial to the third arches

.

101

The right subclavian artery is formed from which aortic arch

a. right first
b. right second
c. right third
d. right fourth
e. left first
f. left second

Right fourth aortic arch

102

Which pair of aortic arches degenerate?

Which pair of aortic arches becomes associated with the pulmonary system?

Degenerate = 5th

Pulmonary system = 6th - dorsal part = ligamentum arteriosus

103

The aortic arch is formed from which aortic arch

a. right first
b. right second
c. right third
d. left second
e. left third
f. left fourth

Left 4th

104

Neural crest contributes to the structure of which of the following?

a. Truncus arteriosus
b. Ascending aorta
c. Pulmonary trunk
d. All of the above
e. None of the above

All of the above

105

For which of these cardiovascular malformations is a patent ductus arteriosus necessary for survival of the individual?

a. Atrial septal defect
b. Ventricular septal defect
c. Double aortic arch
d. Right subclavian artery from arch of aorta
e. None of the above

None of the above

106

Five days after birth, an infant become cyanotic during a prolonged crying spell. The cyanosis is most likely caused by venous blood entering the systemic circulation through the:

a. Interatrial septum
b. Ductus arteriosus
c. Ductus venosus
d. Umbilical vein
e. Interventricular septum

Interatrial septum