Nokea
What is the primary principle involved in the various airway clearance devices used for mobilizing secretions?
- A. Vibration
- B. Inhalation therapy
- C. Chest physiotherapy
- D. Positive expiratory pressure
Correct Answer: D
Rationale: The primary principle involved in airway clearance devices used for mobilizing secretions is positive expiratory pressure, which helps in loosening and moving mucus from the airways.
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Which chamber of the heart is most commonly affected in heart failure?
- A. Left atrium
- B. Right atrium
- C. Left ventricle
- D. Right ventricle
Correct Answer: C
Rationale: The correct answer is C: Left ventricle. The left ventricle is the chamber responsible for pumping oxygenated blood to the rest of the body, making it the most commonly affected in heart failure. When the left ventricle weakens or becomes stiff, it can lead to inefficient pumping, causing fluid buildup and symptoms of heart failure. The other choices, A: Left atrium, B: Right atrium, and D: Right ventricle, are less commonly affected in heart failure as they have different functions in the heart's circulation.
The Alveolar epithelium is lined with
- A. Non-ciliated Squamous epithelium
- B. Ciliated Squamous epithelium
- C. Ciliated epithelium
- D. Ciliated Columnar epithelium
Correct Answer: A
Rationale: The correct answer is A: Non-ciliated Squamous epithelium. The alveolar epithelium in the lungs is composed of thin, flat cells called squamous epithelium. This type of epithelium allows for efficient gas exchange by providing a short diffusion distance. Ciliated epithelium (choice C) and ciliated columnar epithelium (choice D) are not found in the alveoli as they are more suited for moving mucus and debris in the respiratory tract. Ciliated squamous epithelium (choice B) is not a common epithelial type in the alveoli and is not as thin as non-ciliated squamous epithelium, making it less efficient for gas exchange.
The impulse for voluntary muscles for forceful breathing starts in
- A. Medulla (Pons)
- B. Vagus nerve
- C. Cerebral hemispheres
- D. Spinal cord
Correct Answer: C
Rationale: The correct answer is C: Cerebral hemispheres. The impulse for voluntary muscles for forceful breathing originates in the cerebral hemispheres where conscious control over breathing is regulated. The cerebral cortex sends signals to the respiratory muscles to increase or decrease breathing effort based on the body's needs. The other choices are incorrect because:
A: Medulla (Pons) - This region of the brainstem is responsible for automatic breathing control, not voluntary forceful breathing.
B: Vagus nerve - The vagus nerve is not directly involved in initiating voluntary breathing movements.
D: Spinal cord - While the spinal cord plays a role in coordinating some aspects of breathing, it is not the primary center for voluntary forceful breathing control.
How is a client positioned for a thoracentesis?
- A. The client sits at the side of the bed.
- B. The client lies on the affected side.
- C. The client lies flat on the back.
- D. The client lies down with the head raised.
Correct Answer: A
Rationale: The correct answer is A. For thoracentesis, the client typically sits at the edge of the bed, leaning forward with arms supported on a table or over their knees to spread out the intercostal spaces and stabilize the chest wall. B is incorrect because lying on the affected side would compress the area being accessed. C is wrong as lying flat reduces access to the pleural space. D is incorrect because raising the head is not standard positioning for this procedure.
A patient with active TB continues to have positive sputum cultures after 6 months of treatment. She says she cannot remember to take the medication all the time. What is the best action for the nurse to take?
- A. Schedule the patient to come to the clinic every day to take the medication.
- B. Have a patient who has recovered from TB tell the patient about his successful treatment.
- C. Schedule more teaching sessions so the patient will understand the risks of noncompliance.
- D. Arrange for directly observed therapy by a responsible family member or a public health nurse.
Correct Answer: D
Rationale: Directly observed therapy by a responsible family member or a public health nurse is the best action to ensure adherence to TB treatment and prevent further drug resistance.