what is the primary function of surfactant in the lungs
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Nursing Elites

HESI LPN

HESI PN Exit Exam

1. What is the primary function of surfactant in the lungs?

Correct answer: A

Rationale: The primary function of surfactant in the lungs is to reduce surface tension in the alveoli. This reduction in surface tension prevents lung collapse and allows for easier breathing. It is particularly crucial in premature infants to help with lung expansion. Choice B is incorrect because surfactant primarily affects surface tension, not oxygen absorption. Choice C is incorrect because surfactant's main role is not in facilitating carbon dioxide release. Choice D is incorrect because surfactant does not directly increase lung volume; its main role is in reducing surface tension.

2. A post-operative client is recovering from a total knee replacement and is prescribed patient-controlled analgesia (PCA). What is the primary advantage of PCA for managing post-operative pain?

Correct answer: A

Rationale: The primary advantage of PCA for managing post-operative pain is that it allows the client to control the administration of pain medication, leading to consistent pain control without overmedication. Choice B is incorrect as PCA does not eliminate the need for oral pain medication; it supplements it. Choice C is incorrect because while PCA can help reduce opioid consumption, it does not directly reduce the risk of opioid addiction. Choice D is incorrect as PCA actually requires close monitoring by nursing staff to ensure proper use and prevent complications.

3. In a group therapy setting, one member is very demanding, repeatedly interrupting others and taking most of the group time. The nurse's best response would be:

Correct answer: A

Rationale: In a group therapy setting, where each member should have the opportunity to participate, it is essential for the nurse to manage disruptive behavior assertively yet respectfully. Choice A is the best response as it addresses the issue of one member dominating the group time by asking them to summarize their point briefly, allowing others to contribute. Choice B is confrontational and may alienate the individual, hindering the therapeutic process. Choice C expresses personal frustration, which is not constructive in managing the situation. Choice D of ignoring the behavior is not effective as it allows the disruptive behavior to continue, impacting the group dynamics negatively.

4. The PN observes a UAP bathing a bedfast client with the bed in the high position. Which action should the PN take?

Correct answer: D

Rationale: The correct action for the PN to take in this situation is to instruct the UAP to lower the bed for safety. Keeping the bed in the lowest position during care activities is crucial for preventing falls and injuries to both the client and the caregiver. Instructing the UAP to lower the bed addresses the immediate safety concern. Choice A is incorrect because simply supervising the UAP without addressing the unsafe bed height does not ensure the client's safety. Choice B is incorrect as the priority is to address the safety concern rather than offering assistance to the UAP. Choice C is incorrect as assuming care of the client immediately does not address the root issue of the high bed position.

5. At what age does a 9-year-old child typically lose which of the following teeth?

Correct answer: A

Rationale: A 9-year-old child typically loses their central incisors, not the lateral incisors or second molars. The central incisors are usually among the first teeth that children lose around 6 to 7 years of age, as part of the natural process of shedding primary teeth to make way for permanent teeth. The second molars and cuspids are typically lost later in the mixed dentition phase. Therefore, option A, 'Central incisor,' is the correct answer.

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