Nokea
When preparing to teach a class about prenatal development, the nurse would include information about folic acid supplementation. What is folic acid known to prevent?
- A. Congenital heart defects
- B. Neural tube defects
- C. Mental retardation
- D. Premature birth
Correct Answer: B
Rationale: It is now known that folic acid supplements can prevent neural tube defects such as spina bifida.
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The nurse explains that the birth weight of monozygotic twins is frequently below average. What is the most likely cause?
- A. Inadequate space in the uterus
- B. Inadequate blood supply
- C. Inadequate maternal health
- D. Inadequate placental nutrition
Correct Answer: D
Rationale: The single placenta may not be able to provide adequate nutrition to two fetuses.
What is the most common site for fertilization?
- A. Lower segment of the uterus
- B. Outer third of the fallopian tube near the ovary
- C. Upper portion of the uterus
- D. Area of the fallopian tube farthest from the ovary
Correct Answer: B
Rationale: Fertilization takes place in the outer third of the fallopian tube, which is closest to the ovary.
What organ does the ductus venosus shunt blood away from in fetal circulation?
- A. Liver
- B. Heart
- C. Lungs
- D. Kidneys
Correct Answer: A
Rationale: Fetal blood bypasses the liver through the ductus venosus by carrying blood directly to the inferior vena cava.
What complication can result from untreated respiratory distress in the newborn?
- A. Esophageal atresia
- B. Gastric dilation
- C. Cold stress
- D. Reopening of the foramen ovale
Correct Answer: D
Rationale: Respiratory distress can cause increased pressure in the right ventricle, causing reopening of the foramen ovale.
What part of the fetal body derives from the mesoderm?
- A. Nails
- B. Oil glands
- C. Muscles
- D. Lining of the bladder
Correct Answer: C
Rationale: The mesoderm is responsible for the development of muscles. Nails and oil glands derive from the ectoderm. The lining of the bladder derives from the endoderm.