Nursing Elites

1. The _____ is the inner layer of the embryo from which the lungs and digestive system develop.

• A. neural tube
• B. mesoderm
• C. endoderm
• D. umbilical cord

Correct answer: C

Rationale: The endoderm is the correct answer. It is the innermost layer of the embryo that gives rise to organs such as the lungs, digestive system, liver, and pancreas. The neural tube (Choice A) forms the brain and spinal cord, not the lungs or digestive system. Mesoderm (Choice B) develops into structures like muscles, bones, and circulatory system, not the lungs or digestive system. The umbilical cord (Choice D) serves as a connection between the embryo and the placenta, providing nutrients and oxygen, but it is not the layer from which lungs and digestive system develop.

2. _______ is a genetic disorder in which blood does not clot properly.

• A. Cystic fibrosis
• B. Hemophilia
• C. Lymphoma
• D. Huntington’s disease

Correct answer: B

Rationale: Hemophilia is a genetic disorder characterized by a deficiency in blood clotting factors, leading to prolonged bleeding. Cystic fibrosis is a genetic disorder that affects the lungs and digestive system, not blood clotting. Lymphoma is a type of cancer originating in the lymphatic system and is not related to blood clotting abnormalities. Huntington's disease is a neurodegenerative genetic disorder that affects a person's ability to move, think, and behave.

3. The healthcare provider is planning care for a client at 30 weeks gestation who is experiencing preterm labor. Which medication is most important in preventing this fetus from developing respiratory distress syndrome?

• A. Ampicillin 1 gram IV push every 8 hours
• B. Betamethasone 12 mg deep IM
• C. Terbutaline 0.25 mg subcutaneously every 15 minutes for 3 doses
• D. Butorphanol tartrate 1 mg IV push every 2 hours as needed

Correct answer: B

Rationale: Betamethasone is a corticosteroid given to stimulate fetal lung maturity and reduce the risk of respiratory distress syndrome in preterm infants. Ampicillin (Choice A) is an antibiotic and does not prevent respiratory distress syndrome. Terbutaline (Choice C) is a tocolytic used to inhibit contractions and does not directly prevent respiratory distress syndrome. Butorphanol tartrate (Choice D) is an opioid analgesic and does not have a role in preventing respiratory distress syndrome in preterm infants.

4. A client is in the second stage of labor. Which of the following manifestations should the nurse expect?

• A. The client expels the placenta
• B. The client experiences gradual dilation of the cervix
• C. The client begins having regular contractions
• D. The client delivers the newborn

Correct answer: D

Rationale: During the second stage of labor, the cervix is fully dilated, and the client delivers the newborn. The expulsion of the placenta occurs during the third stage of labor, not the second stage. Regular contractions typically begin in the first stage of labor, not the second. Gradual dilation of the cervix occurs during the first stage of labor, specifically during the active phase.

5. According to a study in 2014 by Skakkebaek et al., who among the following is most likely to have gynecomastia?

• A. Jennifer, a dancer, who has Down syndrome
• B. Frank, a teacher, who is diagnosed with XYY syndrome
• C. Peter, a fashion designer, who has Klinefelter syndrome
• D. Ria, a gym instructor, who is diagnosed with Turner syndrome

Correct answer: C

Rationale: Individuals with Klinefelter syndrome have an extra X chromosome (XXY) and typically have reduced testosterone levels, which can lead to gynecomastia (enlarged breasts). This condition is not usually associated with Down syndrome (choice A), XYY syndrome (choice B), or Turner syndrome (choice D), making them less likely to have gynecomastia.

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