Final answer:
The normal adult range for blood sodium concentration is (B) 135-146 mM. This range is crucial for maintaining bodily functions, and deviations can lead to significant health issues such as hypertension or hypotension.
Step-by-step explanation:
The normal adult range for sodium concentration in the blood is an important aspect of maintaining homeostasis in the human body. Sodium is the principal ion in the fluid outside of cells and plays a crucial role in neuromuscular function, permeability of cells, and fluid balance. The question asks to identify the normal range of sodium for an adult, where the provided choices are A, B, and C.
Based on the setpoint and normal range concept and the reference values provided, the normal sodium range falls within the parameters of choice B. 135-146 mM. This range ensures proper bodily function and avoids conditions that could arise from sodium levels that are too high (hypernatremia) or too low (hyponatremia).
It is imperative for healthcare providers to monitor sodium levels closely, as deviations from the normal range can have significant health implications. Excessive sodium intake may contribute to hypertension (elevated blood pressure), while inadequate intake may lead to hypotension (low blood pressure). Therefore, understanding normal sodium levels is essential for both overall health and specific medical conditions.