Correct Answer: A

Rationale: Albuterol (salbutamol) is a short-acting beta agonist bronchodilator commonly used for quick relief of bronchoconstriction in patients with COPD. It works by relaxing the smooth muscles in the airways, allowing for easier breathing and improved airflow. The patient's increased dyspnea, wheezing, and productive cough are indicative of bronchoconstriction, and albuterol is the most appropriate medication to provide rapid bronchodilation and symptom relief in this situation. Diphenhydramine (Benadryl) is an antihistamine and not typically used for bronchodilation in COPD. Montelukast (Singulair) is a leukotriene receptor antagonist that may be used in the maintenance treatment of COPD but is not the initial choice for acute symptom relief. Prednisone is a cortic

Correct Answer: A

Rationale: Albuterol (salbutamol) is a short-acting beta agonist bronchodilator commonly used for quick relief of bronchoconstriction in patients with COPD. It works by relaxing the smooth muscles in the airways, allowing for easier breathing and improved airflow. The patient's increased dyspnea, wheezing, and productive cough are indicative of bronchoconstriction, and albuterol is the most appropriate medication to provide rapid bronchodilation and symptom relief in this situation. Diphenhydramine (Benadryl) is an antihistamine and not typically used for bronchodilation in COPD. Montelukast (Singulair) is a leukotriene receptor antagonist that may be used in the maintenance treatment of COPD but is not the initial choice for acute symptom relief. Prednisone is a cortic

Correct Answer: C

Rationale: Autonomy is the ethical principle that upholds an individual's right to make decisions about their own medical treatment, free from coercion or undue influence. In this scenario, the 70-year-old patient has voluntarily decided not to have the pacemaker inserted despite the physician's recommendation. The fact that the decision is respected by the family further highlights the importance of autonomy in this situation. Respecting the patient's right to make choices regarding their own healthcare, even if it goes against medical advice, demonstrates a commitment to autonomy as an ethical principle.

Correct Answer: A

Rationale: Bleeding is the most serious complication of Dengue infection, typically occurring between the 4th to 7th day after the onset of symptoms. This is known as the critical phase of Dengue fever, where the patient is at a higher risk of developing severe symptoms such as bleeding manifestations. Monitoring for symptoms of bleeding during this period is crucial for timely intervention and proper management to prevent further complications or fatalities. While bleeding can occur outside this timeframe in some cases, the 4th to 7th day window is when the risk is highest and vigilance is most needed.

Correct Answer: A

Rationale: T helper cells (Th cells) are primarily responsible for coordinating and regulating immune responses by producing cytokines that direct the activities of other immune cells. These cytokines help in activating cytotoxic T cells, B cells, macrophages, and other cells involved in the immune response. Th cells play a crucial role in mounting an effective immune response against infections and diseases by providing the necessary signals to activate and control various immune cells. Thus, T helper cells are considered the central coordinators of the immune system.