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FACTORS INFLUENCING THE SECRETION OF NITROGEN IN SHEEP SALIVA
Author(s) -
Somers M
Publication year - 1961
Publication title -
australian journal of experimental biology and medical science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.999
H-Index - 104
eISSN - 1440-1711
pISSN - 0004-945X
DOI - 10.1038/icb.1961.14
Subject(s) - saliva , nitrogen balance , nitrogen , urea , excretion , zoology , urea nitrogen , secretion , blood urea nitrogen , chemistry , urine , medicine , endocrinology , biology , biochemistry , creatinine , organic chemistry
SUMMARY Differential responses occurred in the amount of urea nitrogen and total nitrogen secreted in the parotid saliva, according to the nitrogen status of the sheep, when 1·4 gm. of urea nitrogen was injected into the blood daily. Of this amount of nitrogen, 0·1 gm. could be recovered in the secretion from one parotid gland daily when the sheep were in positive nitrogen balance, and 0·3 gm. when the sheep were in negative nitrogen balance. The urinary excretion accounted for 1·0 gm. of the 1·4 gm. of urea nitrogen injected daily when the sheep were in positive nitrogen balance, but only 0·3 gm. per day at the lower nitrogen status. The implications of these findings were discussed in relation to a urea conservation mechanism in sheep.