Nokea
What occurs in the intervillous space in the developing placenta?
- A. None
- B. Oxygen and nutrients perfuse across the chorion villi to enter fetal circulation.
- C. None
- D. None
Correct Answer: B
Rationale: This is the primary function of the intervillous space.
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An expectant mother asks the nurse when her baby’s heart will begin to beat. The nurse explains that this will occur at which time?
- A. The 8th gestational week
- B. The 4th gestational week
- C. The 12th gestational week
- D. The 16th gestational week
Correct Answer: B
Rationale: The heart begins to beat by the 4th gestational week.
During a pregnant woman’s second trimester anatomy scan, the fetus was in breech position. The patient is now 34 weeks pregnant and asks how she can tell if the baby is in the right position. What test might be ordered to determine this?
- A. a biophysical profile
- B. an ultrasound
- C. a fetoscopy
- D. a nonstress test
Correct Answer: B
Rationale: An ultrasound can determine the fetus's position. Other tests are not typically used for this purpose.
The nurse is discussing genetically linked diseases with a couple planning a pregnancy. The female states, 'I am concerned because there is a history of sickle-cell disease in my family.' Which information from the nurse is correct?
- A. Any offspring will have the disease.
- B. Only male children will have the disease.
- C. The male partner needs genetic testing.
- D. The couple should not become pregnant.
Correct Answer: C
Rationale: The male partner should undergo genetic testing to determine if he is a carrier of the sickle-cell gene. This information guides the couple's reproductive decisions.
A female carries one positive genetic marker for Huntington’s disease. Her partner does not have any markers for the disease. For which reason is it so important for this family to identify persons with the genetic marker?
- A. The Huntington gene is recessive
- B. All of the couple’s offspring will have the disease
- C. Symptoms do not manifest until 30 to 50 years of age
- D. The expression of the disease is varied by individual
Correct Answer: C
Rationale: Symptoms of Huntington's disease manifest later in life, making genetic identification crucial. The other choices either incorrectly describe the genetics of the disease or do not address the significance of identifying carriers.
The nurse explains to the patient at 28 weeks’ gestation not to lie flat on their back during the remainder of the pregnancy. What does this precaution prevent?
- A. acid reflux
- B. headaches
- C. pregnancy-induced hypertension
- D. vena cava syndrome
Correct Answer: D
Rationale: Lying flat can compress the vena cava, leading to reduced blood flow. Other options are unrelated.