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. What is the most effective way to communicate with a patient who has expressive aphasia?

Correct answer: C

Rationale: The most effective way to communicate with a patient who has expressive aphasia is by using picture boards or communication cards. These tools allow patients to convey their needs and responses more effectively when they struggle to speak. Using picture boards or communication cards (Choice C) is preferred as it provides a visual aid to support communication. Asking yes or no questions (Choice A) may limit the patient's ability to express themselves fully. Encouraging the patient to write responses (Choice B) may not be suitable if the patient also has difficulty writing due to the aphasia. While speaking slowly and clearly (Choice D) is important, it may not be sufficient to overcome the communication challenges faced by patients with expressive aphasia.

3. The nurse enters a male client's room to administer routine morning medications, and the client is on the phone. Which action is best for the nurse to take?

Correct answer: B

Rationale: The best action for the nurse to take in this situation is to wait for the client to excuse himself from the telephone conversation and then observe the client taking the medication. This approach ensures that the client takes the medication as prescribed, promoting compliance and safety. Choice A is not ideal as it involves unnecessary delegation and may lead to confusion. Choice C is incorrect because assuming refusal without direct communication can compromise patient care. Choice D is not recommended as leaving the medication with the client unsupervised may result in non-compliance or potential errors.

4. The practical nurse is caring for a client who had a total laryngectomy, left radical neck dissection, and tracheostomy. The client is receiving nasogastric tube feedings via an enteral pump. Today the rate of feeding is increased from 50 ml/hr to 75 ml/hr. What parameter should the PN use to evaluate the client's tolerance to the rate of the feeding?

Correct answer: B

Rationale: Monitoring gastric residual volumes helps to assess how well the client is tolerating the increased feeding rate. High residuals may indicate delayed gastric emptying, which could lead to complications like aspiration. This helps in adjusting the feeding plan as necessary. Daily weight (Choice A) is not the most appropriate parameter to evaluate tolerance to feeding rate changes. Bowel sounds (Choice C) and urinary/stool output (Choice D) are important assessments but do not directly indicate tolerance to enteral feeding rate changes.

5. What is an essential nursing action before administering a blood transfusion?

Correct answer: B

Rationale: Verifying the blood type and patient identity with another nurse is crucial before administering a blood transfusion. This step helps prevent transfusion reactions and ensures that the correct blood is given to the right patient. Checking the patient’s blood pressure, although important, is not directly related to verifying blood type and patient identity. Flushing the IV line with saline is a good practice but is not as critical as confirming the blood type and patient identity. Administering pre-transfusion medications would come after verifying the blood type and patient identity.

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