Correct Answer: D

Rationale: The correct answer is D (Downward) because it helps to maintain a clear airway for effective mouth-to-mouth respiration. By holding the victim's chin downward, you can ensure proper alignment of the airway, allowing the tongue to fall forward and prevent obstruction. Holding the chin forward (Choice A) may cause the airway to close, holding it backward (Choice B) may strain the neck, and holding it sideward (Choice C) may not provide optimal airway alignment. Holding the chin downward is the most effective and safe method for providing mouth-to-mouth respiration.

Correct Answer: C

Rationale: Step-by-step rationale: 1. Statement C indicates a misunderstanding that medication can be stopped when feeling better, which is incorrect. 2. Hypertension is a chronic condition that often requires lifelong medication. 3. This demonstrates a lack of understanding regarding the necessity of long-term management. 4. Statements A, B, and D show knowledge about hypertension's effects, dietary management, and awareness, respectively. Summary: Statement C is incorrect as it suggests stopping medication, while statements A, B, and D show accurate understanding of hypertension.

Correct Answer: C

Rationale: The correct answer is C: IgM. During an acute infection, the body's initial response is rapid and non-specific, leading to the production of IgM antibodies first. IgM is the first immunoglobulin class produced in response to a new antigen, providing immediate protection. IgG is produced later in the immune response and is responsible for long-term immunity. IgE is involved in allergic reactions and parasitic infections, not typically the first response to infection. IgD is primarily found on the surface of B cells and its function is not well understood in the context of acute infections.

Correct Answer: A

Rationale: The correct answer is A because maintaining consistency in the order of drawing different types of insulin into the syringe helps prevent medication errors. When mixing insulins, drawing them in the same sequence ensures the correct dose and prevents contamination. Explanation: A: Following the same order ensures accurate dosing and minimizes the risk of mixing up insulins. B: Shaking the vial can cause air bubbles which can affect the accuracy of the dose. C: Storing insulin in the freezer can damage the medication and alter its effectiveness. D: Cloudiness in intermediate-acting insulin is normal and does not indicate it should be discarded.

Correct Answer: C

Rationale: The correct answer is C: Report sudden onset of acute pain. This is the highest priority because sudden onset of acute pain postoperatively can indicate a serious complication such as hemorrhage or infection. Prompt reporting allows for timely intervention to prevent further complications. A: Do not leave the patient unattended at any time - While important for safety, it is not the highest priority compared to addressing sudden onset of acute pain. B: Teach the patient not to bend over - Important for preventing complications postoperatively, but not as urgent as addressing sudden onset of acute pain. D: Apply sandbags to either side of the head - This intervention is not typically indicated for postoperative eye patients and would not address the potential serious complication of sudden onset of acute pain.