American Association of Critical-Care Nurses (AACN) Certification Practice Test

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Prepare for the AACN Certification Test. Study with flashcards and multiple choice questions, each question comes with hints and explanations. Get ready for your exam!

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What is the normal sodium range in serum?

120-130
135-145
140-150
125-135

The correct answer is: 135-145

The normal sodium level in serum typically ranges from 135 to 145 mEq/L. Sodium is a crucial electrolyte in the body that aids in fluid balance, nerve transmission, and muscle function. Maintaining this range is vital for homeostasis. When sodium levels fall below 135, it is categorized as hyponatremia, which can lead to various health complications due to imbalances in fluid and electrolytes. Conversely, levels above 145 indicate hypernatremia, which can also cause significant issues. The chosen range effectively captures the standardized values used in clinical practice, highlighting its importance in the assessment and management of patients across various settings.