A nurse is caring for a primigravida who asks about the function of the placenta.The nurse responds correctly when explaining which of the following are functions of the placenta?
Cushions fetus from maternal movement.
Provides thermoregulation.
Metabolic and gas exchange.
Provides a sterile environment.
The Correct Answer is C
Choice A rationale
The placenta does not cushion the fetus from maternal movement. Instead, the amniotic fluid within the amniotic sac provides cushioning and protection to the fetus from external forces and maternal movements.
Choice B rationale
The placenta does not provide thermoregulation. Thermoregulation is primarily managed by the mother’s body. The placenta’s main functions are related to nutrient and gas exchange, hormone production, and waste removal.
Choice C rationale
The placenta is responsible for metabolic and gas exchange. It provides oxygen and nutrients to the fetus while removing waste products from the fetal blood. This exchange occurs through the placental barrier, which separates maternal and fetal blood.
Choice D rationale
The placenta does not provide a sterile environment. The amniotic sac and its fluid help maintain a sterile environment for the fetus. The placenta’s role is more focused on nutrient and gas exchange, hormone production, and waste removal.
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View Related questions
Correct Answer is C
Explanation
Choice A rationale
Taking iron with milk is not recommended because calcium in milk can inhibit the absorption of iron. It is better to take iron supplements with a source of vitamin C, which enhances iron absorption.
Choice B rationale
Iron supplements typically cause constipation rather than loose stools. Common side effects include nausea, vomiting, and dark stools.
Choice C rationale
Taking iron with vitamin C enhances absorption. Vitamin C converts iron into a form that is more easily absorbed by the body, making it more effective in treating iron deficiency anemia.
Choice D rationale
Iron supplements are best absorbed on an empty stomach, but they can cause gastrointestinal discomfort. If this occurs, taking them with a small amount of food may help, but it should not be taken with dairy products or calcium-rich foods.
Correct Answer is D
Explanation
Choice A rationale
Having a child with blue eyes is not an indication for genetic testing. Eye color is a polygenic trait and does not typically warrant genetic testing.
Choice B rationale
Reactive airway disease in preterm children is not a direct indication for genetic testing. This condition is more related to the complications of prematurity rather than genetic factors.
Choice C rationale
Neonatal jaundice is common and usually resolves without long-term issues. It is not typically an indication for genetic testing unless there is a suspicion of an underlying genetic disorder.
Choice D rationale
Tay-Sachs Disease is a genetic disorder, and having a child with this condition is a strong indication for genetic testing. This would help determine the risk of recurrence in future pregnancies and provide valuable information for family planning. .