The nurse recognizes mechanical stimuli involved with the transition to extrauterine pulmonary function includes:
Entry of air into alveoli replacing the expelled amniotic fluid.
Decreased oxygen levels after the cessation of placental blood flow.
Upward movement of the diaphragm to create passive inspiration.
Drying off and stimulating the newborn helps to trigger respiratory response.
The Correct Answer is A
A. The entry of air into the alveoli, replacing expelled amniotic fluid, is a critical mechanical stimulus that initiates the transition to neonatal breathing.
B. Decreased oxygen levels trigger chemical, not mechanical, stimuli.
C. The diaphragm moves downward during inspiration, not upward.
D. Drying and stimulation help initiate breathing through sensory stimulation, not mechanical.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is {"dropdown-group-1":"B","dropdown-group-2":"C"}
Explanation
Prolactin: This hormone, released by the anterior pituitary gland, stimulates the alveolar cells in the mammary glands to produce breast milk. Prolactin levels increase significantly after birth in response to the infant's suckling.
Oxytocin: Released by the posterior pituitary gland, oxytocin triggers the contraction of the myoepithelial cells surrounding the alveoli, causing milk to be ejected from the ducts, a process known as the let-down reflex.
Correct Answer is B
Explanation
A. The basal metabolic rate may increase as a result of cold stress, but the primary purpose of the warmer is to prevent cold stress.
B. Newborns are at risk of cold stress because they have a large body surface area and limited ability to regulate body temperature. A radiant warmer is used to help maintain the newborn’s body temperature and prevent cold stress.
C. Newborns do not typically shiver to generate heat. They rely on mechanisms such as non-shivering thermogenesis (use of brown fat).
D. Brown fat is used for heat production, but the goal of the radiant warmer is to prevent cold stress, not directly stimulate brown fat production.
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