Correct Answer: A

Rationale: The correct answer is A: Open the airway. This is the first intervention because ensuring a clear airway is crucial for adequate oxygenation. If the airway is obstructed, oxygen administered or suctioning performed may not be effective. Checking for breathing should follow airway opening. Administering oxygen can be done once the airway is established. Suctioning is not the priority unless there is evidence of airway obstruction.

Correct Answer: B

Rationale: The given ABG values fall within normal ranges, indicating homeostasis. The pH is within the normal range (7.35-7.45), indicating acid-base balance. The PO2 is slightly lower but still within the normal range (80-100 mmHg). PCO2 falls within the normal range (35-45 mmHg), showing effective ventilation. The HCO3 level is also within the normal range (22-26 mEq/L), indicating proper kidney function. Therefore, all values are within normal limits, reflecting a state of homeostasis. Other choices are incorrect as they suggest imbalances in acid-base status, which is not seen with these values.

Correct Answer: A

Rationale: The correct answer is A: Administer pain relief. This is the priority action because managing pain is crucial in providing comfort and reducing distress for the client with a severe burn. Pain relief helps in improving the client's overall well-being and promotes better recovery. Administering corticosteroids (Choice B) is not the priority as pain relief takes precedence. Monitoring for infection (Choice C) is important but not the immediate priority. Applying dressings (Choice D) is also important but should come after administering pain relief.

Correct Answer: D

Rationale: The correct answer is D: Administer morphine. Administering morphine is the first intervention for a client experiencing a myocardial infarction (MI) to help relieve pain and reduce anxiety. Oxygen may not be necessary if the client is not hypoxic. Administering aspirin is important but usually follows morphine. Monitoring ECG is crucial, but not the first intervention to address the immediate symptoms of MI.

Correct Answer: C

Rationale: Rationale: Choice C, apply ice, is the correct answer as the first intervention for a client at risk for dehydration. Applying ice helps to lower the body temperature, which can reduce sweating and fluid loss. This intervention is crucial in preventing further dehydration. Administering IV fluids (Choice A) may be necessary in severe dehydration cases, but it is not the first intervention. Administering oxygen (Choice B) is not directly related to dehydration. Elevating the leg (Choice D) is not effective in addressing dehydration. In summary, applying ice is the most appropriate initial intervention to prevent dehydration by reducing body temperature and fluid loss.