Nokea
Some of the embryo’s intestines remain within the umbilical cord during the embryonic period because the
- A. intestines need this time to grow until week
- B. nutrient content of the blood is higher in this location.
- C. abdomen is too small to contain all the organs while they are developing.
- D. umbilical cord is much larger at this time than it will be at the end of pregnancy.
Correct Answer: C
Rationale: During early development of the fetus, the umbilical cord is relatively larger compared to later stages of pregnancy. This is because the umbilical cord plays a crucial role in providing necessary nutrients, oxygen, and removing waste products from the developing baby. As the pregnancy progresses, the blood vessels in the umbilical cord mature and shrink in diameter, leading to a decrease in its overall size compared to the early stages. The larger size of the umbilical cord in early pregnancy facilitates efficient nutrient exchange between the mother and the developing fetus, supporting the baby's growth and development.
You may also like to solve these questions
The nurse is explaining fetal circulation to a student. Which statement by the nurse is correct?
- A. There is an opening between the atria that allows blood to flow directly to the lungs for oxygenation.
- B. There is a shunt between the aorta and the pulmonary vein that bypasses the lungs.
- C. The ductus arteriosus allows blood to flow from the pulmonary artery to the aorta.
- D. The foramen ovale closes just before birth.
Correct Answer: C
Rationale: The ductus arteriosus allows blood to bypass the lungs, directing it from the pulmonary artery to the aorta.
What are the number and type of chromosomes in a normal mature gamete?
- A. 22 autosomes
- B. 22 autosomes and one sex chromosome
- C. 46 chromosomes
- D. 23 autosomes
Correct Answer: B
Rationale: Gametes have 22 autosomes and one sex chromosome, resulting in 23 chromosomes in total.
What information would the nurse include when teaching a patient newly diagnosed with Huntington disease about having children?
- A. “Both you and your partner must carry the gene for your children to get the disease.”
- B. “The gene is found on the X chromosome. Only male children have a risk of inheriting the disease.”
- C. “You have a 50 percent chance of passing the gene on to your children.”
- D. “It occurs only when the chromosomes don’t divide correctly, causing one cell to have too many chromosomes.”
Correct Answer: C
Rationale: Huntington disease is autosomal dominant, so there is a 50% chance of passing the gene to offspring.
The nurse is conducting a staff in-service on multifetal pregnancy. Which statement regarding dizygotic twin development should the nurse include in the teaching session?
- A. Dizygotic twins arise from two fertilized ova and are the same sex.
- B. Dizygotic twins arise from a single fertilized ovum and are always of the same sex.
- C. Dizygotic twins arise from two fertilized ova and may be the same sex or different sexes.
- D. Dizygotic twins arise from a single fertilized ovum and may be the same sex or different sexes.
Correct Answer: C
Rationale: Dizygotic twins, also known as fraternal twins, result from the fertilization of two separate eggs by two sperm cells. Therefore, they have different genetic makeups and can be the same sex or different sexes. This is in contrast to monozygotic twins (identical twins), who arise from a single fertilized egg that splits into two embryos, resulting in twins of the same sex and identical genetic makeup. It is important for the nurse to include this information in the staff in-service on multifetal pregnancy to ensure accuracy and understanding among the attendees.
A 36-year-old G2P0 patient has been told that she has hydramnios. She asks what might have caused this and if it will cause complications. What is the nurse’s correct response?
- A. It is a decrease in the amount of amniotic fluid that occurs as a result of a neural tube defect.
- B. It is an increase in the amount of amniotic fluid, which can compress the baby’s cord.
- C. It is an increase in amniotic fluid that can occur as a result of having diabetes mellitus.
- D. It is a decrease in the amount of amniotic fluid that can cause preterm labor.
Correct Answer: C
Rationale: Hydramnios involves increased amniotic fluid, often linked to diabetes mellitus and may compress the umbilical cord.