The student nurse learns that the hormone necessary for milk production is
Estrogen.
Prolactin.
Progesterone.
Lactogen.
The Correct Answer is B
The correct answer is choice B. Prolactin.
Choice A reason:
Estrogen. Estrogen is a hormone that plays a role in the development of the mammary glands and the ductal system during pregnancy. However, estrogen does not directly produce milk.
In fact, high levels of estrogen during pregnancy inhibit milk secretion by blocking prolactin. Therefore, estrogen is not the hormone necessary for milk production. • Choice B reason:
Prolactin. Prolactin is the hormone responsible for the production of breast milk. Prolactin is secreted by the pituitary gland in response to suckling or nipple stimulation. Prolactin levels rise during pregnancy and peak after delivery, when the sudden drop in estrogen and progesterone allows prolactin to take over and initiate lactation. Therefore, prolactin is the hormone necessary for milk production. • Choice C reason:
Progesterone. Progesterone is a hormone that also contributes to the development of the mammary glands and the alveoli during pregnancy. However, like estrogen, progesterone does not directly produce milk. Progesterone also inhibits milk secretion by blocking prolactin during pregnancy. Therefore, progesterone is not the hormone necessary for milk production. •
Choice D reason:
Lactogen. Lactogen is not a hormone, but a general term for any substance that stimulates lactation. There are different types of lactogens, such as human placental lactogen (hPL), which is produced by the placenta during pregnancy and has some lactogenic effects on the mammary glands. However, hPL is not the main hormone responsible for milk production. That role belongs to prolactin. Therefore, lactogen is not the hormone necessary for milk production.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
No explanation
Correct Answer is A
Explanation
Choice A reason:
Placing a covering on the scale tray when weighing an infant helps to ensure that conductive heat loss from the infant is minimal. Newborns and infants are especially vulnerable to temperature changes, and maintaining their body temperature is crucial for their well-being. By placing a covering, such as a soft cloth or blanket, on the scale tray, the nurse creates a barrier between the infant's skin and the cold surface of the scale. This reduces the risk of heat loss from direct contact with the scale, helping to keep the baby comfortable and preventing any potential adverse effects from exposure to low temperatures during the weighing process.
Choice B reason:
Choice B, compensating for the negative weight balance to ensure the correct weight, is not the primary reason for using a covering on the scale tray. The negative weight balance, if any, would be minimal and not significant enough to affect the accuracy of the infant's weight measurement. The main concern when using a scale for weighing infants is to ensure their comfort and safety during the process.
Choice C reason:
Choice C, avoiding causing multiple startle (Moro) reflexes when weighing, is not the main reason for using a covering on the scale tray. The Moro reflex is a normal startle response in infants and is not typically affected by whether or not a covering is placed on the scale tray.
The nurse can support the infant appropriately during weighing to minimize any startle reflexes, regardless of whether a covering is used.
Choice D reason:
Choice D, avoiding contaminating the nurse's hands with blood or other body substances, is not directly related to using a covering on the scale tray. The primary purpose of using a covering is to minimize heat loss, as explained in Choice A. However, it is standard practice for healthcare professionals to wear gloves when handling blood or body substances to prevent any potential transmission of infections, ensuring both the nurse's and the infant's safety.
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