#1
Which blood vessel carries oxygenated blood from the placenta to the fetus?
Pulmonary artery
Umbilical vein
Pulmonary vein
Aorta
#2
During fetal development, what is the role of the umbilical vein?
Carrying oxygenated blood from the placenta to the fetus
Carrying deoxygenated blood from the fetus to the placenta
Carrying oxygenated blood from the fetus to the placenta
Carrying deoxygenated blood from the placenta to the fetus
#3
Which structure connects the umbilical artery to the fetal descending aorta, allowing deoxygenated blood to bypass the fetal liver?
Ductus venosus
Foramen ovale
Ductus arteriosus
Umbilical vein
#4
Which vessel carries deoxygenated blood from the fetus to the placenta?
Umbilical artery
Umbilical vein
Pulmonary artery
Pulmonary vein
#5
Which structure connects the fetal pulmonary trunk to the aorta, bypassing the lungs?
Foramen ovale
Ductus arteriosus
Ductus venosus
Umbilical vein
#6
What is the main function of the foramen ovale in fetal circulation?
To shunt blood from the right atrium to the left atrium
To shunt blood from the left atrium to the right atrium
To shunt blood from the pulmonary artery to the aorta
To shunt blood from the inferior vena cava to the right atrium
#7
Which fetal blood vessel connects the pulmonary artery to the aorta, bypassing the lungs?
Ductus arteriosus
Foramen ovale
Umbilical vein
Umbilical artery
#8
Which fetal shunt connects the right ventricle to the aorta, bypassing the lungs?
Foramen ovale
Ductus arteriosus
Ductus venosus
Umbilical artery
#9
What is the function of the ductus venosus in fetal circulation?
To shunt blood from the pulmonary artery to the aorta
To shunt blood from the right atrium to the left atrium
To shunt blood from the umbilical vein to the inferior vena cava
To shunt blood from the left atrium to the right atrium
#10
What is the main function of the ductus arteriosus in fetal circulation?
To shunt blood from the right atrium to the left atrium
To shunt blood from the left atrium to the right atrium
To shunt blood from the pulmonary artery to the aorta
To shunt blood from the inferior vena cava to the right atrium
#11
During fetal circulation, which vessel carries oxygenated blood to the inferior vena cava?
Umbilical vein
Umbilical artery
Pulmonary artery
Pulmonary vein
#12
What causes the closure of the ductus arteriosus after birth?
Decreased prostaglandin levels
Increased oxygen concentration in blood
Increased carbon dioxide concentration in blood
Stimulation of the parasympathetic nervous system
#13
Which structure connects the fetal umbilical vein to the inferior vena cava, allowing oxygenated blood to bypass the liver?
Foramen ovale
Ductus arteriosus
Ductus venosus
Umbilical artery
#14
Which fetal blood vessel carries deoxygenated blood from the fetus to the placenta?
Umbilical vein
Umbilical artery
Pulmonary artery
Pulmonary vein
#15
What triggers the closure of the foramen ovale after birth?
Decrease in pulmonary vascular resistance
Decrease in systemic vascular resistance
Increase in atrial pressure in the left atrium
Increase in atrial pressure in the right atrium
#16
What stimulates the closure of the ductus venosus after birth?
Decreased prostaglandin levels
Increased oxygen concentration in blood
Increased carbon dioxide concentration in blood
Stimulation of the sympathetic nervous system
#17
Which structure serves as a communication between the pulmonary trunk and the aorta in fetal circulation?
Foramen ovale
Ductus arteriosus
Ductus venosus
Umbilical artery