Which statement is not a function of water?

Which statement is not a function of water?

• A. Solvent and transport medium
• B. Maintenance of a normal immune system
• C. Lubrication and protection
• D. Maintenance of blood volume

Answer: (B)

Water acts as a universal solvent and transport medium, carrying nutrients, gases, and wastes throughout the body. It also provides lubrication and protection—think of joint fluid and mucus that cushion and coat surfaces. Maintaining blood volume is another direct role, as adequate fluids help sustain plasma volume and circulation. The idea of water sustaining a normal immune system isn’t a direct function; immune defense depends on immune cells, antibodies, and signaling molecules. Hydration can support overall health and keep mucosal barriers functioning well, but it does not by itself maintain immune function.

Water acts as a universal solvent and transport medium, carrying nutrients, gases, and wastes throughout the body. It also provides lubrication and protection—think of joint fluid and mucus that cushion and coat surfaces. Maintaining blood volume is another direct role, as adequate fluids help sustain plasma volume and circulation. The idea of water sustaining a normal immune system isn’t a direct function; immune defense depends on immune cells, antibodies, and signaling molecules. Hydration can support overall health and keep mucosal barriers functioning well, but it does not by itself maintain immune function.