What is the osmolality of human blood plasma?

The osmolality of human blood plasma is typically around 290 mOsm/kg water. This value reflects the concentration of solutes in the plasma, such as sodium, chloride, bicarbonate, and other electrolytes, which are crucial for maintaining osmotic balance in the body. This osmolality is important for various physiological processes, including the regulation of fluid balance and the function of cells.

The range of normal osmolality for blood plasma is often cited between 280 to 300 mOsm/kg, with 290 mOsm/kg representing an average measurement. This balance is critical for proper physiological function, as deviations from this range can lead to clinical conditions, including dehydration or overhydration.

In comparison, values that are significantly lower or higher, such as those mentioned in the other options, do not accurately reflect the typical osmolality of human blood plasma and may indicate pathological conditions if observed in medical assessments.