Answer:
It is secreted by the renal tubules
Explanation:
Because the stomach is lined by a mucous membrane (the gastric mucosa)
Albedo is the "whiteness" of a surface. It is a reflection coefficient, and has a value of less than one. The albedo of a surface is the ratio of radiation reflected from the surface to the incident radiation. Hope this helps. Have a nice day. Feel free to ask more questions.