Nursing Elites

1. Which disorder is characterized by demyelination of neurons in the central nervous system?

• A. Multiple sclerosis
• B. Parkinson's disease
• C. Alzheimer's disease
• D. Huntington's disease

Correct answer: A

Rationale: Multiple sclerosis is the correct answer. It is an autoimmune disease that specifically targets and damages the myelin sheath surrounding neurons in the central nervous system. This demyelination disrupts the transmission of nerve signals and leads to a variety of neurological symptoms. Parkinson's disease (Choice B), Alzheimer's disease (Choice C), and Huntington's disease (Choice D) are neurodegenerative disorders that do not primarily involve demyelination of neurons in the CNS. Parkinson's disease is characterized by the loss of dopamine-producing neurons, Alzheimer's disease by the formation of plaques and tangles in the brain, and Huntington's disease by a genetic mutation affecting nerve cells.

2. The PN and UAP enter a client's room and find the client lying on the bed. The PN determines that the client is unresponsive. Which instruction should the PN give the UAP first?

• A. Obtain emergency help
• B. Feel for a carotid pulse
• C. Bring a glucometer to the room
• D. Check the blood pressure

Correct answer: A

Rationale: The correct answer is to instruct the UAP to obtain emergency help first. When a client is unresponsive, it could indicate a life-threatening condition that requires immediate intervention. Ensuring emergency help is on the way is the priority to address the potentially critical situation. Feeling for a carotid pulse, bringing a glucometer, or checking the blood pressure are important assessments but should come after taking steps to secure immediate assistance.

3. The PN notes that a UAP is ambulating a male client who had a stroke and has right-sided weakness. The UAP is walking on the client's left side. Which action should the PN take?

• A. Instruct the UAP to walk on the client's affected side
• B. Take over the ambulation and provide guidance to the UAP immediately
• C. Provide the client with an assistive device, such as a cane or walker
• D. Tell the UAP to take the client back to his room

Correct answer: A

Rationale: The correct action for the PN to take is to instruct the UAP to walk on the client’s affected side. This is essential to provide the necessary support and prevent falls, especially when the client has weakness on one side due to a stroke. Walking on the affected side helps provide stability and assistance to the weaker side. Choice B is incorrect because it would be more appropriate for the PN to provide immediate guidance and correct the UAP's positioning rather than taking over the task completely. Choice C is incorrect because while assistive devices may be beneficial, the immediate concern is the UAP's positioning during ambulation, not providing the client with an assistive device. Choice D is incorrect as there is no indication to return the client to his room unless it is necessary for his safety or well-being.

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

• A. Oxygen transport
• B. Immunity
• C. Blood clotting
• D. Carbon dioxide transport

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.

5. What is the primary function of surfactant in the lungs?

• A. Reduce surface tension
• B. Enhance oxygen absorption
• C. Facilitate carbon dioxide release
• D. Increase lung volume

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.

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