Nokea
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.
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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 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.
The nurse is presenting a conference on gene dominance. What does the nurse report as the percentage of children carrying the dominant gene if one parent has a dominant gene and the other parent does not?
- A. 10%
- B. 25%
- C. 50%
- D. 100%
Correct Answer: C
Rationale: If one parent has a dominant trait and the other does not, then 50% of the children will inherit the trait.
The normal volume of amniotic fluid is approximately __ mL at 37 weeks' gestation.
Correct Answer: 1000
Rationale: The volume of amniotic fluid steadily increases from about 30 mL at 10 weeks of pregnancy to 350 mL at 20 weeks. The volume of fluid is about 1000 mL at 37 weeks. In the latter part of pregnancy, the fetus may swallow up to 400 mL of amniotic fluid per day and normally excretes urine into the fluid.
A pregnant woman states, 'My husband hopes I will give him a boy because we have three girls.' What will the nurse explain to this woman?
- A. The sex chromosome of the fertilized ovum determines the gender of the child.
- B. When the sperm and ovum are united, there is a 75% chance the child will be a girl.
- C. When the pH of the female reproductive tract is acidic, the child will be a girl.
- D. If a sperm carrying a Y chromosome fertilizes an ovum, then a boy is produced.
Correct Answer: D
Rationale: When a Y-bearing sperm fertilizes an ovum, a male child is produced.