After teaching a pregnant woman about the hormones produced by the placenta, the nurse determines that the teaching was successful when the woman identifies which hormone produced as being the basis for pregnancy tests?
Human placental lactogen (hPL).
Estrogen (estriol).
Progesterone (progestin).
Human chorionic gonadotropin (hCG).
The Correct Answer is D
A. Human placental lactogen (hPL) is a hormone produced by the placenta that helps regulate the metabolism of the mother and fetus, but it is not used as the basis for pregnancy tests. It plays a role in modulating the metabolic state of the mother during pregnancy to facilitate the energy supply of the fetus.
B. Estrogen (estriol) is another hormone produced by the placenta, which is important for maintaining pregnancy and preparing the body for childbirth. However, it is not the hormone detected by pregnancy tests. Estriol levels increase significantly during pregnancy but are not used as a marker for pregnancy tests.
C. Progesterone (progestin) is crucial for maintaining the uterine lining and supporting early pregnancy. While it is essential for a successful pregnancy, it is not the hormone that pregnancy tests detect. Progesterone helps prevent uterine contractions and supports the endometrium.
D. Human chorionic gonadotropin (hCG) is the hormone detected by pregnancy tests. It is produced by the placenta shortly after the embryo attaches to the uterine lining. The presence of hCG in the blood or urine is a reliable indicator of pregnancy, which is why it is the basis for pregnancy tests.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason:
Choice A is the correct answer because the number of wet diapers a newborn has per day is a reliable indicator of effective breastfeeding. When a baby is breastfeeding well and getting enough milk, they will have an adequate number of wet diapers, typically at least six to eight per day. The frequent wet diapers indicate that the baby is adequately hydrated, and their body is eliminating waste products as expected.
Choice B reason:
Choice B, having at least one breast milk stool every 24 hours, is not the most reliable indicator of effective breastfeeding, although it is an important consideration. The frequency of bowel movements can vary among breastfed infants, and some babies may have several bowel movements a day, while others may have fewer, even skipping a day. The number of wet diapers is a more consistent measure of sufficient milk intake.
Choice C reason:
Choice C, sleeping for 6 hours at a time between feedings, is not an accurate indicator of effective breastfeeding in a 4-day-old newborn. Newborns typically feed frequently, at least 8-12 times in 24 hours, and they may not sleep for extended periods between feedings at this age. Frequent feeding is essential for establishing a good milk supply and ensuring the baby receives enough nutrients.
Choice D reason:
Choice D, gaining 1 to 2 ounces per week, is also not the most reliable indicator of effective breastfeeding in the early days after birth. Weight gain can vary significantly in newborns, and a 4-day-old baby might not show the expected 1 to 2 ounces per week gain yet. Moreover, weight gain can be affected by factors other than breastfeeding, such as birth weight, initial fluid loss, and individual growth patterns.
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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