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. An 8-year-old is placed in 90-90 traction for a fractured femur resulting from a motor vehicle collision. Which finding requires further action by the PN?

Correct answer: C

Rationale: In 90-90 traction, it is crucial to ensure that the weights are not touching the foot of the bed as this can disrupt the effective application of traction. This interference can hinder the proper alignment of the fractured femur and impede the healing process. Therefore, this finding requires immediate action to prevent complications. Choices A, B, and D are not directly related to the proper application of traction and do not pose a risk to the patient's treatment or well-being. No bowel movement for two days may indicate constipation but does not directly relate to the traction. Mother assisting the child in changing positions is a supportive action. The child being able to move the toes freely when tickled indicates neurological function, which is a positive sign.

3. When administering an analgesic to a client with low back pain, which intervention should the practical nurse implement to promote the effectiveness of the medication?

Correct answer: A

Rationale: Massaging the lower back and positioning the client in proper alignment can help relieve muscle tension and enhance the effectiveness of analgesics by providing additional comfort and promoting better pain management. This intervention directly addresses the site of pain and can improve the medication's efficacy. Choices B, C, and D are incorrect because while they may have benefits in other situations, they are not directly related to promoting the effectiveness of analgesics in clients with low back pain. Encouraging ambulation and deep breathing, assisting with range of motion exercises, and offering water and high-fiber foods are important for overall patient care but are not specific to enhancing analgesic effectiveness in this context.

4. The client diagnosed with HIV is taught by the nurse that the condition is transmitted through

Correct answer: A

Rationale: HIV can be transmitted from a mother to her baby during childbirth or breastfeeding, making choice A the correct answer. Tears, human bites, and insect bites are not common modes of HIV transmission. While human bites can potentially transmit the virus, it is less common compared to mother-to-child transmission.

5. 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.

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