While reviewing a brain biopsy in a patient with Alzheimer’s…

While reviewing a brain biopsy in a patient with Alzheimer’s disease, the NP notes progressive neuronal loss without inflammatory cells. This looks like dysregulated apoptosis—cells are being eliminated inappropriately but not with the inflammation of necrosis. Which process is present?

A 71-year-old woman is admitted with an ischemic stroke. On…

A 71-year-old woman is admitted with an ischemic stroke. On MRI, the NP reviews pathology showing swollen neurons with ruptured membranes and inflammation. The NP thinks: This isn’t tidy or regulated like apoptosis—this is uncontrolled necrosis from hypoxia. Which process is responsible?

Two weeks after a heart transplant, a 49-year-old man presen…

Two weeks after a heart transplant, a 49-year-old man presents with fever, arrhythmias, and rising cardiac enzymes. The NP thinks: This isn’t IgE or antibodies—it’s host T cells recognizing donor MHC and mounting a cytotoxic response. What is the underlying immune mechanism?

A 65-year-old man with COPD is admitted. ABG: pH 7.28 (norma…

A 65-year-old man with COPD is admitted. ABG: pH 7.28 (normal 7.35–7.45), PaCO₂ 68 mmHg (35–45), HCO₃⁻ 27 mEq/L (22–26). The NP reasons: Low pH and high CO₂ means he’s retaining carbon dioxide from hypoventilation. Which is the primary mechanism?