Quantitation of phosphorus excretion in sheep by compartmental analysis
The control of phosphorus excretion in sheep has been examined by constructing a kinetic model that contains a mechanistic set of connections between blood and gastrointestinal tract. The model was developed using experimental data from chaff-fed sheep and gives an accurate description of the absorption and excretion of /sup 32/P phosphorus in feces and urine of the ruminating sheep. These results indicated the main control site for phosphorus excretion in the ruminating sheep was the gastrointestinal tract, whereas for the non-ruminating sheep fed the liquid diet, control was exerted by the kidney. A critical factor in the induction of adaptation of phosphorus reabsorption by the kidney was the reduction in salivation, and since this response occurred independently of marked changes in the delivery of phosphorus to the kidney, a humoral factor may be involved in this communication between salivary gland and kidney.
- Research Organization:
- La Trobe Univ., Bundoora, Australia
- OSTI ID:
- 5928639
- Journal Information:
- Am. J. Physiol.; (United States), Journal Name: Am. J. Physiol.; (United States) Vol. 252:4; ISSN AJPHA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Elimination of $sup 90$Sr from the bodies of cows
THE EFFECT OF X-RADIATION ON THE EXCRETION OF RADIOACTIVE PHOSPHORUS BY THE URINE IN RATS
Related Subjects
59 BASIC BIOLOGICAL SCIENCES
ABSORPTION
AMINO ACIDS
ANIMALS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL MATERIALS
BIOLOGICAL MODELS
BIOLOGICAL WASTES
BLOOD-PLASMA CLEARANCE
BODY
BODY FLUIDS
CARBOXYLIC ACIDS
CHELATING AGENTS
CHROMIUM 51
CHROMIUM ISOTOPES
CLEARANCE
DAYS LIVING RADIOISOTOPES
DIET
DIGESTIVE SYSTEM
DOMESTIC ANIMALS
EDTA
ELECTRON CAPTURE RADIOISOTOPES
EVEN-ODD NUCLEI
EXCRETION
FECES
GASTROINTESTINAL TRACT
INTERMEDIATE MASS NUCLEI
INTESTINAL ABSORPTION
ISOTOPES
KIDNEYS
LIGHT NUCLEI
MAMMALS
MATERIALS
METABOLISM
NUCLEI
ODD-ODD NUCLEI
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANS
PHOSPHORUS 32
PHOSPHORUS ISOTOPES
RADIOISOTOPES
RUMINANTS
SHEEP
UPTAKE
URINE
VERTEBRATES
WASTES