The serum osmolarity, nerve impulse transmission, and acid-base balance are all regulated by sodium, which is the most abundant extracellular cation and plays a role in each of these processes. This is further explained below.
What is intracellular osmolarity?
Generally, Since internal fluid and extracellular fluid have different osmolalities, the semi-permeable cell membrane allows water to pass through to the compartment that contains more solutes until the concentrations are equal on both sides.
In conclusion, serum osmolarity, nerve impulse transmission, and acid-base balance are all regulated by sodium, which is the most abundant extracellular cation and plays a role in each of these processes.
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