The purpose of surfactant is to?
Provide a heat source for the newborn.
Assist the alveoli to remain open.
Assist the ductus arteriosus to remain open.
Provide energy to the newborn.
The Correct Answer is B
Choice A rationale:
Providing a heat source for the newborn is not the purpose of surfactant. Surfactant is a substance produced in the lungs to reduce surface tension and prevent alveolar collapse during expiration. It helps with the exchange of gases, but it does not generate heat.
Choice B rationale:
This is the correct answer. Surfactant plays a crucial role in assisting the alveoli to remain open by reducing surface tension. This, in turn, allows for proper gas exchange, especially of oxygen and carbon dioxide.
Choice C rationale:
Assisting the ductus arteriosus to remain open is not the purpose of surfactant. The ductus arteriosus is a fetal blood vessel that connects the pulmonary artery to the aorta, bypassing the lungs. After birth, it should close on its own, and surfactant does not influence this process.
Choice D rationale:
Providing energy to the newborn is not the purpose of surfactant. Energy for the newborn comes from nutrition, particularly breast milk or formula, and not from surfactant
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
"Baby powder will help prevent a diaper rash.”.
Choice A rationale:
"I will use mild soap”. indicates an appropriate understanding of newborn bathing. Mild soap is suitable for newborn skin to avoid irritation.
Choice B rationale:
This is the correct answer. Baby powder is not recommended for newborns as it can cause respiratory issues when inhaled and may lead to skin irritation. Therefore, the client needs further teaching about the use of baby powder.
Choice C rationale:
"I will test the water on my wrist for temperature before bathing”. demonstrates proper safety measures, ensuring the water is not too hot for the baby.
Choice D rationale:
"I will use a basin during bathing”. is a reasonable approach to bathing the newborn and does not indicate a need for further teaching.
Correct Answer is B
Explanation
Choice A rationale:
Iron will facilitate bone growth. This statement is not accurate in the context of feeding a newborn with iron-fortified formula. While iron is essential for overall growth and development, its primary role is not specifically related to bone growth. Instead, it plays a crucial role in the production of hemoglobin, which helps carry oxygen in the blood.
Choice B rationale:
Newborns do not metabolize iron adequately. This statement is the correct choice. Newborns have limited iron stores that are obtained from their mothers during pregnancy. As they grow, their iron requirements increase, but their ability to metabolize iron is not fully developed at
birth. Hence, iron-fortified formula is recommended to provide the necessary iron for the newborn's healthy development.
Choice C rationale:
The newborn's iron source will start to deplete. This statement is not accurate in the context of iron-fortified formula feeding. The newborn's initial iron source is the iron stores passed on by the mother during pregnancy. However, the iron-fortified formula is designed to supplement and fulfill the baby's iron needs, preventing depletion of iron stores.
Choice D rationale:
Iron will facilitate eyesight development. This statement is not entirely accurate. While iron is important for many bodily functions, including eye health, it is not specifically responsible for eyesight development in newborns. Visual development in newborns is influenced by various factors, but iron intake through formula feeding directly impacting eyesight is not a primary concern.
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