AACN Certification Practice Test 2025 – Comprehensive Exam Prep

The normal range for calcium levels in the blood is typically defined as 8.5 to 10.5 mg/dL. This range is recognized by various medical laboratories and institutions as indicative of healthy calcium levels in adults. Maintaining calcium within this range is crucial for several physiological functions, including bone health, muscle contraction, nerve transmission, and blood clotting.

When calcium levels fall below or rise above this normal range, it can indicate potential medical issues such as hypocalcemia (low calcium) or hypercalcemia (high calcium), each associated with its own set of health risks. This established normal range helps healthcare providers determine the necessity for treatment or further investigation when a patient's calcium levels are tested.

The other options do not fall within the standard range used in clinical practice. Therefore, they do not accurately represent normal calcium levels. Recognizing the established parameters is essential for both assessment and management of patient health in clinical settings.