The NP assesses a 55-year-old septic patient who is tachypneic. ABG: pH 7.53 (7.35–7.45), PaCO₂ 25 (35–45), HCO₃⁻ 23 (22–26). The NP thinks: This alkalosis is from hyperventilation blowing off too much CO₂

The NP counsels a couple after amniocentesis confirms a fetus has three copies of chromosome 21. This isn’t a point mutation—it’s a whole chromosome error caused by nondisjunction. Which disorder is present?

A 14-year-old presents with polyuria, weight loss, and random glucose 320 mg/dL (normal fasting 70–99, 2-hour

The NP reviews pathology slides from a myocardial infarction and sees swollen cardiac cells with ruptured membranes and inflammation. This is uncontrolled

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 (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?

A 23-year-old woman is hyperventilating during a panic attack. ABG: pH 7.51 (normal 7.35–7.45), PaCO₂ 28 (35–45), HCO₃⁻ 24 (22–26). The NP reflects: She’s blowing off too much CO₂

A 2-month-old with seizures and microcephaly is evaluated. The NP reviews genetic testing: This is PKU—an inherited enzyme defect where a single gene prevents phenylalanine metabolism. Which cellular process explains this?

A 36-year-old woman’s Pap smear shows cervical cells with irregular sizes, shapes, and nuclear changes. The NP reflects: This isn’t just normal adaptation—this looks disorganized and may be precancerous. Which process explains this finding?

Reviewing a biopsy, the NP notes: These cells don’t look like the original tissue anymore. They’ve lost differentiation and function—classic for cancer. What process is this?