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NR 226 Exam 2 (2026) | Chamberlain University | 100+ Exam Questions & Correct Answers | Sleep Disorders, Fluid & Electrolyte Balance, Acid-Base Disorders & Loss, Grief Nursing

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Prepare for NR 226 Exam 2 with this comprehensive study guide featuring 100+ exam-style questions and verified correct answers designed for Chamberlain University nursing students. This resource provides a focused review of the most frequently tested concepts in sleep physiology and disorders, fluid and electrolyte balance, acid-base regulation, arterial blood gas (ABG) interpretation, electrolyte imbalances, and loss, grief, and end-of-life nursing care. Organized in a structured question-and-answer format, this guide strengthens clinical judgment, reinforces evidence-based nursing concepts, and prepares students for unit exams, ATI assessments, HESI examinations, NCLEX-style questions, and clinical competency evaluations. The study guide thoroughly reviews normal laboratory values for sodium, potassium, calcium, magnesium, phosphorus, chloride, bicarbonate, pH, and PaCO₂, along with the assessment and nursing implications of hyponatremia, hypernatremia, hypokalemia, hyperkalemia, hypercalcemia, and hypocalcemia. It also covers circadian rhythms, biological clocks, sleep cycles, insomnia, hypersomnolence, sleep apnea, narcolepsy, cataplexy, parasomnias, sleep deprivation, polysomnography, nocturia, rest promotion, and factors influencing sleep quality. Additional topics include arterial blood gas interpretation, acid-base balance, end-of-life concepts, brain death, cardiopulmonary death, maturational and situational loss, grief-related nursing care, and evidence-based interventions that support safe, patient-centered nursing practice. The concise question-and-answer format makes this resource ideal for rapid review, classroom examinations, ATI Fundamentals, HESI testing, NCLEX preparation, and clinical practice. The content aligns with evidence-based nursing concepts presented in leading nursing references, including: Potter, P. A., Perry, A. G., Stockert, P. A., & Hall, A. M. Fundamentals of Nursing. Elsevier. Hinkle, J. L., & Cheever, K. H. Brunner & Suddarth's Textbook of Medical-Surgical Nursing. Wolters Kluwer. Ignatavicius, D. D., Workman, M. L., & Rebar, C. R. Medical-Surgical Nursing: Concepts for Interprofessional Collaborative Care. Elsevier. American Association of Critical-Care Nurses (AACN). AACN Essentials of Critical Care Nursing. Hospice and Palliative Nurses Association (HPNA). Core Curriculum for Hospice and Palliative Nursing. Relevant Students: Chamberlain University NR 226 students Bachelor of Science in Nursing (BSN) students Associate Degree in Nursing (ADN) students Practical Nursing (PN/LPN/LVN) students Fundamentals of Nursing students Adult Health Nursing students Medical-Surgical Nursing students Gerontological Nursing students ATI Fundamentals students HESI Nursing students NCLEX-RN candidates Nursing students preparing for exams, clinical check-offs, and competency assessments Keywords: NR 226 Exam 2, NR226, Chamberlain University, sleep disorders, sleep physiology, sleep deprivation, circadian rhythm, biological clocks, REM sleep, NREM sleep, insomnia, sleep apnea, narcolepsy, cataplexy, hypersomnolence, parasomnias, nocturia, polysomnography, bruxism, sleep assessment, rest, fluid and electrolyte balance, electrolyte imbalances, sodium, hyponatremia, hypernatremia, potassium, hypokalemia, hyperkalemia, calcium, hypocalcemia, hypercalcemia, magnesium, phosphorus, chloride, acid-base balance, arterial blood gases, ABG interpretation, bicarbonate, PaCO2, respiratory acidosis, respiratory alkalosis, metabolic acidosis, metabolic alkalosis, laboratory values, nursing interventions, loss and grief, maturational loss, situational loss, end-of-life care, brain death, cardiopulmonary death, ATI preparation, HESI preparation, NCLEX preparation, nursing exam questions, nursing study guide

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NR 226 EXAM 2

136-145 mEq - ANSWER ✔✔Normal lab value of Sodium


3.5-5.0 mEq - ANSWER ✔✔Normal lab value of potassium


8.4-10.5 mg/dL - ANSWER ✔✔Normal lab value of calcium


1.5-2.5 mEq - ANSWER ✔✔Normal lab value of magnesium


2.7-4.5 mg/dL - ANSWER ✔✔Normal lab value of phosphorus


98-106 mEq - ANSWER ✔✔Normal lab value of chlorine.


7.35-7.45 - ANSWER ✔✔Normal pH value


22-26 mEq - ANSWER ✔✔Normal Bicarbonate value (HCO3)


35-45 mm Hg - ANSWER ✔✔Normal PaCO2 value

, Decreased level of consciousness (confusion, lethargy, coma), seizures

if develops rapidly or is very severe - ANSWER ✔✔Signs and

symptoms of Hyponatremia

Decreased level of consciousness (confusion, lethargy, coma), perhaps

thirst, seizures if develops rapidly or is very severe - ANSWER

✔✔Signs and symptoms of Hypernatremia


Bilateral muscle weakness that begins in quadriceps and may ascend to

respiratory muscles, abdominal distention, decreased bowel sounds,

constipation, dysrhythmias. - ANSWER ✔✔Signs and symptoms of

Hypokalemia

Bilateral muscle weakness in quadriceps, transient abdominal cramps,

diarrhea, dysrhythmias, cardiac arrest if severe. - ANSWER ✔✔Signs

and symptoms of Hyperkalemia

Anorexia, nausea and vomiting, constipation, fatigue, diminished

reflexes, lethargy, decreased level of consciousness, confusion,

personality change, cardiac arrest if severe. - ANSWER ✔✔Signs

and symptoms of Hypercalcemia

Numbness and tingling of fingers, toes, and circumoral (around mouth)

region, positive Chvostek's sign (contraction of facial muscles when

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