The nurse is caring for a client who has begun vomiting.
The nurse is aware that which part of the client’s brain has been stimulated?
Limbic system.
Hypothalamus.
Chemoreceptor trigger zone (CTZ).
Medulla oblongata.
The Correct Answer is C
The CTZ has to be stimulated in order for vomiting to occur. The CTZ is located in the area postrema of the medulla oblongata and receives input from various sources, such as the blood, the vestibular system, and the gastrointestinal tract.
Choice A is wrong because the limbic system involves emotion, not vomiting or other forms of GI function.
Choice B is wrong because the hypothalamus regulates various functions such as body temperature, hunger, thirst, and circadian rhythms, but not vomiting.
Choice D is wrong because the medulla oblongata is responsible for autonomic functioning such as ventilation, cardiac conduction, and vomiting, but it is not the site of stimulation for vomiting.
The medulla oblongata contains the vomiting center, which receives signals from the CTZ and other sources and initiates the act of vomiting.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Glycerin suppositories are safe and effective for infants with constipation. They work by lubricating and softening the stool, and stimulating the rectal muscles to contract.
Choice B is wrong because magnesium hydroxide is not recommended for infants under 6 months of age, and may cause diarrhea, electrolyte imbalance, or magnesium toxicity.
Choice Cis wrong because watchful waiting for 24 hours may not be enough to relieve the infant’s discomfort and may lead to further complications such as fecal impaction or dehydration.
Choice Dis wrong because feeding supplementation with free water may not be sufficient to treat constipation, and may dilute the infant’s intake of nutrients and electrolytes.
Correct Answer is D
Explanation
Choice A reason:
Injury sustained to the perineum during birth is not a perinatal injury, but a perineal injury. The perineum is the area between the anus and the genitals, and it can be torn or cut during vaginal delivery. This is a common complication that affects the mother, not the fetus or newborn.
Choice B reason:
Traumatic injury to the mother during pregnancy is not a perinatal injury, but a maternal injury. This can occur due to accidents, violence, or complications of pregnancy such as preeclampsia or placental abruption. This can affect the mother's health and well-being, and may also have consequences for the fetus or newborn.
Choice C reason:
Traumatic injury to a fetus is not a perinatal injury, but a fetal injury. This can occur due to external forces such as blunt trauma, penetrating trauma, or radiation exposure that affect the fetus in utero. This can cause fetal distress, bleeding, fractures, or organ damage.
Choice D reason:
Injury sustained surrounding birth is a perinatal injury. This occurs in the period shortly before, during, or after delivery. This can be a critical time when the baby has to transition from surviving off oxygen, blood, and nutrients from the mother to separating from the womb and breathing oxygen from the air. Perinatal injuries can include head injuries, nerve injuries, hemorrhages, fractures, or soft-tissue injuries that result from the forces of labor and delivery or medical interventions such as forceps or vacuum extraction. Perinatal injuries can lead to long-term neurodevelopmental challenges for the newborn.
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