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Deliberate technique — active listening, open-ended questions, silence, reflection — that makes a patient willing to tell you what you actually need to know.

What an RN, LPN/LVN and UAP may each legally do — the boundary framework every delegation and assignment decision starts from.

The ANA Code of Ethics for Nurses — nine provisions, the four core ethical principles, and how it functions as a non-negotiable professional standard rather than an aspiration.

The framework separating what caused a disease from how it unfolds — etiology, pathogenesis, clinical manifestations, and how risk factors differ from causes.

The acute inflammatory cascade and its five cardinal signs, the shift to chronic inflammation, and how innate and adaptive immunity differ.

The single-equation, unit-canceling method behind every dosage calculation — the approach proctored competency exams require, and why it beats memorized formulas.

State Nurse Practice Acts, Boards of Nursing, and ANA's Scope and Standards — the legal and professional instruments that define what a nurse may do.

How drugs are grouped — by therapeutic use, mechanism, chemical class and body system — and why learning the class beats memorizing individual drugs.

The Rights of Medication Administration, high-alert medications, and the system-level design that catches human error before it reaches a patient.

Standard precautions applied to every patient, plus contact, droplet and airborne transmission-based precautions and the PPE each one requires.

Activities of daily living, positioning and safe patient handling, body mechanics, and restraint alternatives — the daily care that prevents most preventable harm.

Temperature, pulse, respirations, blood pressure, oxygen saturation and pain — technique, normal ranges, and reading the trend rather than the number.

The standardized taxonomy of nursing diagnoses — problem, etiology, and evidence — that turns assessment data into something a nurse can actually plan around.

What makes consent informed and valid, the nurse's specific role as witness rather than discloser, and the right to refuse or withdraw.

What the body does to a drug — absorption, distribution, metabolism, excretion — and why organ function, route and half-life change every dose decision.

Inspection, palpation, percussion and auscultation applied system by system — the objective half of assessment, and the order the techniques are performed in.

Structured collection of subjective data — chief complaint, history of present illness, past history, medications and review of systems — through the patient's own account.

How cells adapt to stress — hypertrophy, hyperplasia, atrophy, metaplasia, dysplasia — and where reversible injury becomes necrosis or apoptosis.

Choosing the scope of an assessment — full head-to-toe baseline, focused problem-specific exam, or rapid emergency survey — based on the situation and the time available.

The chart as clinical communication and legal record — objective vs. subjective, timeliness, corrections, and what belongs in an incident report instead.