The measurement of lecithin in relation to sphingomyelin (L/S ratio) is used to determine fetal lung maturity. Which ratio reflects maturity of the lungs?

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Fetal Development Questions Questions

Question 1 of 5

The measurement of lecithin in relation to sphingomyelin (L/S ratio) is used to determine fetal lung maturity. Which ratio reflects maturity of the lungs?

Correct Answer: C

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 2 of 5

A woman is 15 weeks pregnant with her first baby. She asks how long it will be before she feels the baby move. The best answer is:

Correct Answer: B

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 3 of 5

The nurse is explaining the process of cell division during the preembryonic period to a group of nursing students. Which statement best describes the characteristics of the morula?

Correct Answer: D

Rationale: The correct answer is D because a morula is a solid ball composed of the first cells formed after fertilization. During the preembryonic period, the zygote undergoes several rounds of cell division to form a morula, which is a compact cluster of cells. A: is incorrect as a fertilized ovum is a zygote, not a morula. B: is incorrect as the double layer of cells that becomes the placenta is the bilaminar germ disc, not the morula. C: is incorrect as a flattened, disk-shaped layer of cells within a fluid-filled sphere describes the blastocyst, not the morula. Thus, the characteristics of a morula being a solid ball composed of the first cells formed after fertilization make option D the correct choice.

Question 4 of 5

Which statement best describes the changes that occur during the fetal period of development?

Correct Answer: A

Rationale: The correct answer is A because during the fetal period, organ systems continue to mature and develop to become fully functional. This includes refining the structures and functions of organs that have already been formed during the embryonic period. Option B is incorrect because basic organ systems are already formed during the embryonic period. Option C is incorrect as organs are still susceptible to damage during the fetal period. Option D is incorrect because the development of placental oxygen–carbon dioxide exchange primarily occurs during the early stages of pregnancy, not specifically during the fetal period.

Question 5 of 5

The nurse is assessing a newborn immediately after birth. After assigning the first Apgar score of 9, the nurse notes two vessels in the umbilical cord. What is the nurse’s next action?

Correct Answer: A

Rationale: The correct answer is A. The nurse should assess for other abnormalities of the infant because the presence of two vessels in the umbilical cord (a condition known as a two-vessel cord) may be associated with other congenital anomalies. By assessing for other abnormalities, the nurse can identify any potential issues that may require immediate intervention or further evaluation. This proactive approach ensures the newborn's well-being and allows for timely management of any additional concerns. Summary of other choices: B: Noting the finding in the chart is important but does not address the immediate need to assess for other abnormalities. C: Notifying the health care provider is important, but assessing for other abnormalities should be the nurse's initial priority. D: Calling for the neonatal resuscitation team is not necessary based solely on the presence of a two-vessel cord; further assessment is needed before determining the need for resuscitation.

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