A nurse is teaching a new mother about breastfeeding. The nurse determines that the teaching was successful when the woman identifies which hormone as responsible for milk let-down?
progesterone
estrogen
prolactin
oxytocin
The Correct Answer is D
A. Progesterone plays a significant role in maintaining pregnancy and preparing the breasts for lactation, but it is not responsible for the milk let-down reflex.
B. Estrogen helps with breast development and ductal growth during pregnancy, but it does not trigger the milk let-down reflex.
C. Prolactin is responsible for milk production (lactogenesis) but not for the actual release of milk from the breast.
D. Oxytocin is the hormone responsible for the milk let-down reflex, which causes milk to be released from the milk glands into the nipple when the baby suckles. It also promotes uterine contractions after childbirth.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Ferning is a test to detect ferning patterns in amniotic fluid under a microscope. A positive result indicates the presence of amniotic fluid but does not suggest infection.
B. Yellow-green fluid may suggest meconium-stained amniotic fluid, which is often associated with fetal distress, but it does not directly indicate infection. However, it can increase the risk of infection if the meconium is aspirated by the baby.
C. Foul odor is a key sign that infection may be present, particularly in the case of chorioamnionitis, an infection of the fetal membranes. A foul odor in the amniotic fluid suggests the presence of bacteria and should raise concern for infection, requiring prompt intervention.
D. Blue color on Nitrazine testing indicates that the amniotic fluid is alkaline, which is expected and normal, as amniotic fluid typically has a pH of 7-7.5. This test is used to confirm the rupture of membranes, not infection.
Correct Answer is B
Explanation
A. Convection is the loss of heat due to air or fluid movement around the body. While keeping the newborn warm in a draft-free area can help with this, the blanket on the scale primarily addresses heat loss through contact with the cold surface.
B. Conduction occurs when heat is transferred from the baby’s body to a cooler surface that it comes into direct contact with, like the cold scale. By placing a warmed blanket on the scale, the nurse minimizes heat loss due to conduction, ensuring the baby stays warm.
C. Radiation involves heat transfer to cooler objects nearby, but a warmed blanket on the scale does not directly address heat loss through radiation.
D. Evaporation occurs when moisture on the skin evaporates, taking heat away. A warmed blanket would not primarily address evaporation; it’s meant to prevent conduction heat loss.
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