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. The UAP reports to the nurse that a client refused to bathe for the third consecutive day. Which action is best for the nurse to take?

Correct answer: D

Rationale: The correct action for the nurse to take is to ask the client why the bath was refused. Understanding the client's reason for refusal is crucial in identifying and addressing any underlying concerns or issues that may be contributing to the refusal. This approach promotes open communication, client-centered care, and helps in developing a plan of care that is tailored to the client's needs and preferences. Choices A, B, and C do not directly address the root cause of the refusal and may not effectively resolve the situation.

3. When a small fire breaks out in the kitchen of a long-term care facility, which task is most important for the nurse to perform instead of assigning to a UAP?

Correct answer: C

Rationale: During a fire emergency in a long-term care facility, the most critical task for the nurse is to identify the method for transporting and evacuating each resident. This task requires quick decision-making and critical thinking, which are essential in ensuring the safety and well-being of the residents. Closing the doors to residents' rooms (Choice A) can help contain the fire but should not be the nurse's top priority. While offering comfort and reassurance (Choice B) is important, the immediate focus should be on ensuring safe evacuation. Providing blankets (Choice D) is also important but comes after ensuring safe transportation and evacuation plans are in place.

4. Which type of isolation precaution is required for a patient with tuberculosis (TB)?

Correct answer: C

Rationale: The correct answer is C: Airborne precautions. Tuberculosis (TB) is transmitted via airborne particles, thus requiring airborne precautions to prevent the spread of infection. This includes using an N95 respirator to filter out small infectious particles. Droplet precautions (Choice A) are used for diseases that spread through large respiratory droplets. Contact precautions (Choice B) are for direct or indirect contact with the patient or their environment. Standard precautions (Choice D) are used for all patients to prevent the spread of infection through blood, bodily fluids, non-intact skin, and mucous membranes.

5. Which intervention is most appropriate when caring for a patient experiencing a tonic-clonic seizure?

Correct answer: C

Rationale: During a tonic-clonic seizure, the priority is to ensure patient safety by maintaining an open airway to prevent aspiration. Turning the patient to the side helps achieve this goal by allowing any fluids to drain out of the mouth, reducing the risk of choking or aspiration. Restraint can lead to injury, placing a tongue depressor can cause harm or obstruct the airway further, and attempting to stop the seizure by holding the patient's arms is ineffective and can also result in injury. Therefore, the most appropriate intervention is to turn the patient to the side.

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