By the end of this Gold Standard lesson, the learner should be able to: - Explain normal state, initial insult, cellular response, organ response, compensation, decompensation, clinical findings, and complications for Respiratory Acidosis vs Alkalosis (Clinical Correlation). - Interpret ABG values and clinical context to identify respiratory acidosis versus respiratory alkalosis. - Differentiate the management of CO2 retention (ventilatory support) from hyperventilation syndromes (treat the cause). - Apply assessment-to-action reasoning to recognise CO2 narcosis in the drowsy COPD patient with rising SpO2 on supplemental O2. - Distinguish a patient needing ventilatory support from one needing oxygen alone, and avoid masking ventilation failure with O2. On the exam, writers often pair stable-sounding options with unstable data—notice the mismatch before you commit. If the stem names a license or role, reread that line; scope errors are classic trap answers even when the clinical topic is familiar. Run a 60-second scan: breathing work and oxygenation, perfusion and end organs, neuro baseline, likely infection sources, and devices that can fail quietly. When two answers feel partly right, pick the one that reduces imminent harm...