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. 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.

3. Which task could the PN safely delegate to the UAP?

Correct answer: A

Rationale: The correct answer is A because oral feeding of a child is a task that can be safely delegated to an unlicensed assistive personnel (UAP). This task involves providing basic care and does not require specialized nursing skills. Choices B, C, and D involve assessments, recording client goals, and evaluating pain, respectively, which all require specialized nursing knowledge, judgment, and skills. These tasks are not within the scope of practice for a UAP.

4. Which statement by a mature adult client with advanced prostate cancer best indicates that he has reached a level of acceptance of his prognosis?

Correct answer: B

Rationale: The correct answer is B because finding support in faith and family is a common way for individuals to cope with serious illnesses and come to terms with their prognosis. This statement indicates that the client has found a source of strength and comfort to deal with their situation. Choice A reflects defiance rather than acceptance. Choice C suggests denial or disbelief in the diagnosis. Choice D shows factual knowledge about the disease but does not necessarily indicate acceptance of the prognosis.

5. A client with a prescription for a transcutaneous electrical nerve stimulator (TENS) unit for pain management asks how it works. What information should the nurse reinforce?

Correct answer: D

Rationale: The correct answer is D. TENS works by delivering a mild electrical stimulus that can block pain signals from reaching the brain, effectively reducing the perception of pain. Choice A is incorrect because TENS does not distract from pain but rather interferes with pain signals. Choice B is incorrect as TENS does not involve infusing medication into the spinal canal. Choice C is also incorrect because TENS does not target the cerebral cortex to dull pain perception but rather works at the level of nerve conduction.

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