what is the primary function of the hemoglobin in red blood cells
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HESI LPN

HESI PN Exit Exam 2023

1. What is the primary function of hemoglobin in red blood cells?

Correct answer: A

Rationale: The primary function of hemoglobin in red blood cells is to transport oxygen from the lungs to body tissues and return carbon dioxide from the tissues to the lungs. Hemoglobin binds to oxygen in the lungs and releases it in the body's tissues. Choice B is incorrect because hemoglobin is not involved in protecting the body from infections. Choice C is incorrect because blood clotting is mainly facilitated by platelets and clotting factors, not hemoglobin. Choice D is incorrect because the regulation of body temperature is mainly controlled by processes like sweating and shivering, not by hemoglobin.

2. The PN is assisting the recreational director of a long-term care facility to plan outdoor activities for wheelchair-bound older residents who are mentally alert. Which activity meets the physical and social needs of these residents?

Correct answer: B

Rationale: A tea party in the courtyard is the most suitable activity as it allows for social interaction in a comfortable and accessible environment. Wheelchair-bound residents can easily participate, fostering both physical and social engagement. An open-air concert may pose challenges regarding accessibility and comfort for wheelchair-bound individuals. A team ring-toss competition involves physical activity that may not be inclusive for all residents, especially those in wheelchairs. A picnic in the park may also present challenges related to accessibility and comfort for wheelchair-bound individuals.

3. 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 nurse?

Correct answer: C

Rationale: The correct answer is C. In 90-90 traction, the weights should hang freely and not touch the foot of the bed to maintain proper traction and bone alignment. Option A is not necessarily a concern as bowel movements can be influenced by various factors, including diet changes and pain medication. Option B indicates good caregiver involvement, promoting comfort and preventing complications. Option D demonstrates neurovascular function, which is a positive finding. Therefore, the weights touching the foot of the bed is the finding that requires immediate attention to ensure the effectiveness of the traction.

4. Which of the following is NOT a second-line agent used for the treatment of Tuberculosis?

Correct answer: C

Rationale: The correct answer is C, Rifabutin. Rifabutin is actually a first-line drug used in the treatment of tuberculosis. Choices A, B, and D (Amikacin, Moxifloxacin, and Cycloserine) are considered second-line agents for tuberculosis treatment. These drugs are used when the first-line medications are either ineffective or cannot be tolerated by the patient.

5. A client who is post-operative from a bowel resection is experiencing abdominal distention and pain. The nurse notices the client has not passed gas or had a bowel movement. What should the nurse assess first?

Correct answer: A

Rationale: Assessing bowel sounds is crucial in this situation as it helps determine if the client's gastrointestinal tract is functioning properly. Absent or hypoactive bowel sounds can indicate an ileus, a common post-operative complication. Assessing fluid intake (Choice B) is important but should come after assessing bowel sounds. Pain assessment (Choice C) is essential but addressing the physiological issue should take precedence. Checking the surgical incision (Choice D) is relevant but not the priority when the client is experiencing abdominal distention and potential gastrointestinal complications.

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