Which of the following statements regarding the placenta is correct?
A. The placenta allows oxygen, carbon dioxide, and other products to transfer between the mother and fetus but does not allow blood to mix between the mother and fetus.
B. The placental barrier consists of two layers of cells and allows the mother's blood that contains high concentrations of oxygen to directly mix with the blood of the fetus.
C. The placenta, also referred to as the afterbirth, provides oxygen and nutrients to the fetus and is expelled from the vagina about 30 minutes before the baby is born.
D. The placenta allows for the transfer of oxygen and carbon dioxide between the mother and fetus but prevents most medications from passing between the mother and fetus.
Answer: A. The placenta allows oxygen, carbon dioxide, and other products to transfer between the mother and fetus but does not allow blood to mix between the mother and fetus.
You might also like to view...
What group is NOT commonly affected by hate crimes?
A) Racial B) Religious C) Educational fraternities D) Those who are disabled
A junctional escape beat occurs when:
A) the AV junction becomes irritable and temporarily overrides the SA node. B) there is a conduction block between the SA node and AV node. C) there is an accessory pathway that causes reentry of the impulse at the AV node. D) the rate of the SA node is slower than that of the AV node.