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. An adult client is undergoing weekly external radiation treatments for breast cancer. Upon arrival at the outpatient clinic for a scheduled treatment, the client reports increasing fatigue to the PN who is taking the client's vital signs. What action should the PN implement?

Correct answer: D

Rationale: When a client undergoing radiation therapy reports increasing fatigue, it is essential to address this common side effect. Educating the client on the importance of rest and sleep can help manage fatigue and promote recovery. Contacting the healthcare provider or charge nurse immediately may not be necessary unless fatigue is severe and other symptoms are present. Rescheduling the treatment or monitoring vital signs more frequently is not the priority in this situation.

3. An older client is admitted to the psychiatric unit for assessment of a recent onset of dementia. The PN notes that in the evening this client often becomes restless, confused, and agitated. Which intervention is most important for the PN to implement?

Correct answer: C

Rationale: Sundowning, a phenomenon where dementia symptoms worsen in the evening, can be managed by ensuring the client is close to the nurses' station for frequent monitoring and quick intervention, if necessary. This reduces the risk of harm and helps manage agitation. Asking family members to remain with the client may not always be feasible and does not address the need for close monitoring. Administering benzodiazepines should not be the first-line intervention for sundowning as it can increase the risk of falls and other adverse effects. Postponing medication administration may disrupt the client's routine and potentially worsen symptoms.

4. During an inspection of a client's fingernails, the nurse notices a suspected abnormality in the shape and character of the nails. Which finding should the nurse document?

Correct answer: A

Rationale: Clubbed nails are a significant finding in clients with chronic hypoxia or lung disease. This abnormality is characterized by an increased curvature of the nails and softening of the nail bed. It can indicate underlying health conditions such as respiratory or cardiovascular issues. Splinter hemorrhages (B) are small areas of bleeding under the nails, typically associated with infective endocarditis. Longitudinal ridges (C) are often a normal age-related change in the nails. Koilonychia or spoon nails (D) present as a concave shape of the nails and are commonly seen in clients with iron deficiency anemia or hemochromatosis. Therefore, documenting clubbed nails is the most relevant abnormality to report and investigate further.

5. All of the following are posture and body alignment problems EXCEPT:

Correct answer: C

Rationale: Thrombosis is a condition involving blood clots and is not related to posture or body alignment, unlike kyphosis, scoliosis, and lumbar lordosis, which are spinal alignment issues. Kyphosis refers to excessive outward curvature of the spine, scoliosis is characterized by a sideways curvature of the spine, and lumbar lordosis involves an exaggerated inward curve in the lower back. Thrombosis, on the other hand, is a condition where blood clots form in the blood vessels, not a posture or body alignment problem.

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