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. Prior to giving digoxin, the PN assesses that a 2-month-old infant's heart rate is 120 beats/minute. Based on this finding, what action should the PN take?

Correct answer: B

Rationale: A heart rate of 120 beats per minute is within the normal range for a 2-month-old infant. Therefore, it is safe to administer the digoxin and document the heart rate as part of routine care. Choice A is incorrect as withholding the medication is not necessary since the heart rate is normal. Choice C is incorrect as there is no need to delay the administration until the next scheduled dose when the heart rate is within the normal range. Choice D is incorrect as the primary nurse is not needed to administer the medication since the heart rate is normal and falls within the safe range for administration.

3. A client with uterine cancer asks the nurse, 'Which is the most common type of cancer in women?' The nurse replies that it is breast cancer. Which type of cancer causes the most deaths in women?

Correct answer: B

Rationale: Lung cancer is the leading cause of cancer-related deaths in women, surpassing even breast cancer. While breast cancer is more common, it is often detected early enough for effective treatment. Lung cancer, on the other hand, tends to be diagnosed at later stages, leading to higher mortality rates. Brain cancer and colon and rectal cancer are not the leading causes of cancer-related deaths in women, making them incorrect choices.

4. A child with glomerulonephritis is admitted in the acute edematous phase. Based on this diagnosis, which nursing intervention should the nurse plan to include in the child's plan of care?

Correct answer: C

Rationale: The correct answer is to measure blood pressure every 4 to 6 hours. Monitoring blood pressure frequently is crucial in managing glomerulonephritis, as hypertension is a common complication during the acute edematous phase. Choice A is incorrect as it does not address the specific needs of a child with glomerulonephritis. Choice B is incorrect as excessive activity may not be suitable during the acute phase, as rest and monitoring are more important. Choice D is incorrect as the focus should be on monitoring vital signs rather than meal options.

5. While assessing an older male client who takes psychotropic medications, the nurse observes uncontrollable hand movements and excessive blinking. Which information in the client's medical record should the nurse review?

Correct answer: C

Rationale: The symptoms of uncontrollable hand movements and excessive blinking are indicative of tardive dyskinesia, a possible side effect of long-term use of psychotropic medications. Reviewing the screening for tardive dyskinesia is crucial to assess if these symptoms are related to the medication. Option A, the prescription for lorazepam, is less relevant as the focus should be on potential side effects rather than the specific medication. Option B, history of Parkinson's disease, is not directly related to the observed symptoms, which are more likely linked to medication side effects. Option D, recent urine drug screen report, is not as pertinent in this context compared to reviewing the screening for tardive dyskinesia.

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