what is the primary function of 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 correct answer is A: Oxygen transport. Hemoglobin in red blood cells binds to oxygen in the lungs and carries it to tissues throughout the body, releasing it where needed. This process is essential for cellular respiration and energy production. Choices B, C, and D are incorrect because hemoglobin's primary function is not related to immunity, blood clotting, or carbon dioxide transport. Hemoglobin's main role is to transport oxygen, ensuring adequate oxygen supply to body tissues for metabolic processes.

2. Based on the computer documentation in the EMR, which action should the PN implement?

Correct answer: A

Rationale: The rubella vaccine is crucial for preventing rubella infection, which can cause severe congenital disabilities if contracted during pregnancy. Administering the vaccine subcutaneously is the correct action based on EMR documentation. Observing breastfeeding, calling the nursery for blood type results, and administering pain medication are not indicated by the EMR documentation and are not relevant to the situation described in the question.

3. Which information should the nurse collect during the admission assessment of a terminally ill client to an acute care facility?

Correct answer: B

Rationale: During the admission assessment of a terminally ill client, it is crucial for the nurse to collect the client's wishes regarding organ donation. This information is vital to ensure that the care provided aligns with the client's values and preferences. Option A, 'Name of funeral home to contact,' is not a priority during the admission assessment and can be addressed later. Option C, 'Contact information for the client's next of kin,' is important but not as critical as understanding the client's wishes regarding organ donation. Option D, 'Healthcare proxy information,' is important for decision-making if the client is unable to make healthcare decisions, but knowing the client's wishes regarding organ donation takes precedence in this scenario.

4. Which of the following factors increases the risk of developing a pressure ulcer?

Correct answer: C

Rationale: Immobility is a significant risk factor for pressure ulcers because it leads to prolonged pressure on specific areas of the body, reducing blood flow and leading to tissue breakdown. Choices A, B, and D are incorrect. A high-protein diet can actually aid in wound healing and tissue repair. Frequent repositioning helps relieve pressure on bony prominences, reducing the risk of pressure ulcers. Active range of motion exercises can improve circulation and prevent muscle atrophy, thereby reducing the risk of pressure ulcers.

5. When teaching a patient about the side effects of a new medication, which teaching method is most effective?

Correct answer: D

Rationale: The most effective teaching method when educating a patient about the side effects of a new medication is to use a combination of verbal, written, and demonstration methods. This comprehensive approach ensures that the patient receives information through multiple channels, catering to different learning styles. Verbal instructions allow for direct communication, written materials provide a reference for the patient to review later, and demonstrations offer a visual aid that can enhance understanding. Providing a combination of these methods increases the likelihood of the patient retaining and comprehending the information effectively. Choices A, B, and C are less effective as they do not encompass the benefits of utilizing multiple teaching modalities.

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