twins that derive from a single zygote that has split into two are called
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HESI Maternity 55 Questions

1. Twins that derive from a single zygote that has split into two are called:

Correct answer: A

Rationale: The correct answer is A: monozygotic (MZ) twins. Monozygotic twins, also known as identical twins, occur when a single zygote splits into two embryos, leading to two genetically identical individuals. Choice B, fraternal twins, are twins that develop from two separate eggs fertilized by two different sperm cells, resulting in non-identical siblings. Choice C, non-identical twins, is not a common term used to describe this type of twinning. Choice D, dizygotic (DZ) twins, refer to twins that develop from two separate eggs fertilized by two different sperm cells, leading to non-identical twins.

2. Which of the following statements is true of mutations?

Correct answer: C

Rationale: The correct answer is C. Mutations can occur due to environmental influences such as radiation, chemicals, or other external factors, leading to changes in the DNA sequence. Choice A is incorrect because mutations can also occur due to errors in DNA replication, not solely by chance. Choice B is incorrect as mutations affect the DNA sequence itself, not the production of specific cells. Choice D is incorrect because mutations involve changes in the DNA sequence and do not specifically involve the formation of the DNA structure.

3. A 25-year-old gravida 3, para 2 client gave birth to a 9-pound, 7-ounce boy 4 hours ago after augmentation of labor with oxytocin (Pitocin). She presses her call light and asks for her nurse right away, stating 'I’m bleeding a lot.' What is the most likely cause of postpartum hemorrhage in this client?

Correct answer: C

Rationale: Uterine atony is the most likely cause of bleeding 4 hours after delivery, especially after delivering a macrosomic infant and augmenting labor with oxytocin. Uterine atony is characterized by the inability of the uterine muscles to contract effectively after childbirth, leading to excessive bleeding. The other options, such as retained placental fragments (A), unrepaired vaginal lacerations (B), and puerperal infection (D), are less likely causes of postpartum hemorrhage in this scenario. Retained placental fragments can cause bleeding, but this typically presents earlier than 4 hours postpartum. Unrepaired vaginal lacerations would likely be evident sooner and not typically result in significant bleeding. Puerperal infection is not a common cause of immediate postpartum hemorrhage unless there are other signs of infection present.

4. A nurse is caring for an infant who has signs of neonatal abstinence syndrome. Which of the following actions should the nurse take?

Correct answer: C

Rationale: Initiating seizure precautions is crucial when caring for an infant with neonatal abstinence syndrome due to the increased risk of seizures. Providing a calm environment (Choice A) is important to reduce stimulation as these infants may be irritable. Monitoring blood glucose levels (Choice B) is not typically a priority in neonatal abstinence syndrome unless specific signs or symptoms suggest the need for this assessment. Placing the infant on their back with legs extended (Choice D) does not directly address the potential complications associated with neonatal abstinence syndrome, such as seizures.

5. A 30-year-old primigravida delivers a nine-pound (4082 gram) infant vaginally after a 30-hour labor. What is the priority nursing action for this client?

Correct answer: C

Rationale: After a prolonged labor and delivery of a large infant, the client is at an increased risk for uterine atony and postpartum hemorrhage, making observation for signs of bleeding a priority. Assessing the blood pressure for hypertension (Choice A) is not the priority in this situation as the immediate concern is postpartum hemorrhage. Gently massaging the fundus every four hours (Choice B) is a routine postpartum care activity but is not the priority in this scenario. Encouraging direct contact with the infant (Choice D) is important for bonding but does not address the immediate risk of uterine hemorrhage after delivery.

Similar Questions

A newborn is being assessed by a nurse who was born post-term. Which of the following findings should the nurse expect?
A client is in the second stage of labor. Which of the following manifestations should the nurse expect?
A client who is 24 weeks gestation arrives at the clinic reporting swollen hands. On examination, the nurse notes the client has had a rapid weight gain over six weeks. Which action should the nurse implement next?
A client is 4 hours postpartum and is experiencing hypovolemic shock. Which of the following actions should the nurse take?
Which FHR finding is the most concerning to the nurse providing care to a laboring client?

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