The nurse is reviewing fetal and maternal circulation with a group of nursing students. Which statement by a student demonstrates a need for further clarification?
"The placenta is the site of gas exchange for the fetus."
"The umbilical arteries carry deoxygenated blood from the fetus to the placenta."
"The fetal heart pumps blood to both the placenta and the developing organs."
"Maternal and fetal blood mix to allow for nutrient and oxygen exchange."
The Correct Answer is D
A. "The placenta is the site of gas exchange for the fetus."
This is correct because the placenta facilitates oxygen and carbon dioxide exchange between maternal and fetal circulation without direct blood mixing.
B. "The umbilical arteries carry deoxygenated blood from the fetus to the placenta."
This is correct because the two umbilical arteries carry deoxygenated blood from the fetus to the placenta, where gas exchange occurs.
C. "The fetal heart pumps blood to both the placenta and the developing organs."
This is correct because the fetal heart pumps oxygenated blood to its developing organs and sends deoxygenated blood to the placenta for gas exchange.
D. "Maternal and fetal blood mix to allow for nutrient and oxygen exchange."
This is incorrect because maternal and fetal blood do not mix under normal conditions. Instead, nutrients, gases, and waste products pass through the placental barrier via diffusion. If maternal and fetal blood mix, it could indicate a placental rupture or pathological condition.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. "Placenta previa usually results in a higher risk of maternal hypertension, while abruptio placentae is commonly associated with a low-risk pregnancy.
This is incorrect because abruptio placentae, not placenta previa, is associated with maternal hypertension (e.g., preeclampsia, chronic hypertension). Placenta previa is not related to blood pressure issues.
B. "Placenta previa is characterized by sudden onset of severe abdominal pain and uterine tenderness, while abruptio placentae is associated with painless bleeding."
This is incorrect because placenta previa presents with painless, bright red vaginal bleeding, while abruptio placentae causes sudden, severe abdominal pain, uterine tenderness, and possibly dark red bleeding.
C. "Placenta previa typically presents with severe pain and contractions, whereas abruptio placentae involves painless bleeding without contractions."
This is incorrect because placenta previa does not cause pain or contractions. In contrast, abruptio placentae often presents with painful contractions and uterine hypertonicity.
D. "Placenta previa involves the placenta partially or completely covering the cervix, whereas abruptio placentae involves the premature separation of the placenta from the uterine wall."
Placenta previa occurs when the placenta covers the cervix (partial or complete), leading to bleeding. Abruptio placentae occurs when the placenta prematurely separates from the uterine wall, which can lead to hemorrhage and fetal distress.
Correct Answer is A
Explanation
A. The client's vaginal pH may increase during menopause – During menopause, estrogen levels decrease, leading to a higher vaginal pH. This disrupts the normal vaginal flora, making the client more susceptible to infections and irritation.
B. The client's dietary habits and fluid intake – While nutrition and hydration affect overall health, they are not the primary cause of menopausal vaginal symptoms and infections.
C. The client's genitourinary disorder will be alleviated over time – Without treatment (e.g., vaginal estrogen therapy or lubricants), menopausal atrophic changes usually persist or worsen, rather than resolve over time.
D. The client's history of sexually transmitted infections – While STIs can cause vaginal discomfort, the client’s symptoms are more likely due to menopausal changes rather than a past history of STIs.
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