Abstract
The concentration of urea nitrogen in saliva is lower than that in blood and varies in inverse proportion to the rate of secretion. The ammonia nitrogen in saliva is considerably higher than that in blood and is proportionate to the rate of secretion. The total amount of urea plus ammonia nitrogen, is equal to that of urea nitrogen in serum and does not change with the rate of secretion. Ammonia seems to be produced from urea by the activity of gland cells.
The content of thiocyanate in saliva is much higher than that in blood and is in inverse proportion to the rate of secretion. It is suggested that rhodan is taken up from serum by the gland cells.
