Question

multiple choice question
which of the following is a role of sodium in the human body?
o transport of oxygen
o immune function
o maintenance of bone mass
o fluid balance

Explanation:

Sodium helps in maintaining the balance of fluids in and around cells in the human body. Oxygen transport is mainly by hemoglobin, immune function involves various cells and molecules like antibodies, and bone - mass maintenance is related to calcium, vitamin D etc.

Answer:

Fluid balance