Correct Answer: C

Rationale: The correct answer is C: Macrophages. Macrophages are antigen-presenting cells that engulf pathogens and present their antigens to T cells, initiating an immune response. They express major histocompatibility complex (MHC) molecules necessary for T cell recognition. B cells also present antigens but primarily to B cells for antibody production. NK cells are involved in killing infected cells, not antigen presentation. Eosinophils are mainly involved in allergic responses and defense against parasites, not antigen presentation.

Correct Answer: A

Rationale: Encouraging early ambulation and progressive activity as tolerated is the most appropriate nursing intervention to promote optimal recovery for a postpartum client who delivered via cesarean section. Early ambulation helps prevent complications such as blood clots, pneumonia, and constipation. It also promotes circulation and facilitates healing by reducing the risk of postoperative complications. Progressive activity helps the client regain strength, mobility, and independence, which are essential for a speedy recovery. Restoring normal movement will also help decrease discomfort and improve the client's overall well-being. In contrast, restricting movement may lead to complications and delayed recovery. Administering oral analgesics as needed is important for pain management, but promoting early ambulation is essential for optimal recovery. Heat packs should not be applied to the incision site as they can increase the risk of infection and interfere with proper wound healing.

Correct Answer: D

Rationale: The correct answer is D, Broad opening. Nurse Rica should use this communication technique to encourage the patient to freely express themselves without leading or interrupting. This technique helps build rapport and trust, setting a positive tone for the conversation. A: Clarifying may be too direct and might make the patient feel pressured. B: Challenging can create defensiveness and hinder open communication. C: Restating may not be as effective in initiating a conversation as broad opening. In summary, broad opening allows for a more open and relaxed conversation, fostering a conducive environment for effective communication with the patient.

Correct Answer: A

Rationale: The correct answer is A: Enhances the delivery of quality nursing care. Supervision and delegation are essential in ensuring efficient and effective healthcare delivery. By supervising and delegating tasks appropriately, the head nurse can ensure that staff members are performing their duties competently, which ultimately leads to improved quality of patient care. Supervision helps in monitoring staff performance, providing feedback, and offering guidance when needed. Delegation ensures that tasks are allocated to the right staff members based on their skills and abilities, optimizing the workflow. Choices B, C, and D are incorrect because they do not directly relate to the primary purpose of supervision and delegation, which is to enhance the quality of nursing care through effective oversight and task allocation.

Correct Answer: B

Rationale: The correct answer is B: Initiate non-invasive positive pressure ventilation (NIPPV) for respiratory support. In acute exacerbations of COPD, NIPPV helps improve ventilation and oxygenation, reducing the work of breathing and preventing the need for intubation. This intervention is a priority as it can rapidly stabilize the patient's respiratory status. A: Administering bronchodilator medications is important in COPD management, but in severe exacerbations, NIPPV takes precedence. C: Arterial blood gas analysis is important for assessing oxygenation and ventilation status, but it does not directly address the acute respiratory distress. D: Chest physiotherapy can help with airway clearance in COPD, but in acute exacerbations, respiratory support with NIPPV is more urgent.