Question 1

Which structure in fetal circulation allows blood to bypass the non-functioning lungs?

Accepted Answer

Ductus arteriosus

Answer

Ductus venosus

Answer

Foramen ovale

Answer

Umbilical vein

Question 2

What is the primary function of the foramen ovale in fetal circulation?

Accepted Answer

To shunt blood from the right atrium to the left atrium

Answer

To carry oxygenated blood from the placenta

Answer

To connect the aorta to the pulmonary artery

Answer

To drain blood from the liver

Question 3

Which vessel carries deoxygenated blood from the fetus to the placenta?

Accepted Answer

Umbilical arteries

Answer

Umbilical vein

Answer

Ductus venosus

Answer

Aorta

Question 4

What changes occur in fetal circulation at birth?

Accepted Answer

Closure of the foramen ovale and ductus arteriosus

Answer

Increased blood flow to the lungs

Answer

Opening of the ductus venosus

Answer

Reversal of blood flow in the umbilical arteries

Question 5

What is the role of the ductus venosus during fetal development?

Accepted Answer

To direct oxygenated blood from the umbilical vein to the inferior vena cava

Answer

To carry deoxygenated blood to the placenta

Answer

To shunt blood from the right atrium to the left atrium

Answer

To connect the pulmonary artery to the aorta

Question 6

Which of the following fetal structures is responsible for allowing blood to bypass the liver?

Accepted Answer

Ductus venosus

Answer

Ductus arteriosus

Answer

Umbilical artery

Answer

Foramen ovale

Question 7

Which feature of fetal circulation reduces blood flow to the lungs?

Accepted Answer

Pulmonary vascular resistance

Answer

Low pressure in the aorta

Answer

High oxygen levels

Answer

Increased blood volume

Question 8

What is the primary source of oxygenated blood for the fetus during gestation?

Accepted Answer

Umbilical vein

Answer

Amniotic fluid

Answer

Fetal lungs

Answer

Maternal circulation

Question 9

What happens to the ductus arteriosus after birth?

Accepted Answer

It constricts and eventually forms the ligamentum arteriosum

Answer

It becomes part of the aorta

Answer

It connects the pulmonary artery to the left atrium

Answer

It remains open for continuous blood flow

Question 10

Which of the following is NOT a component of fetal circulation?

Accepted Answer

Pulmonary artery

Answer

Foramen ovale

Answer

Umbilical vein

Answer

Ductus arteriosus

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