Phosphorus Flashcards
What is the function of phosphorus?
it is a major component of bone, makes up the cell membrane of phospholipids, aids in control of pH
What is the normal plasma level of phosphorus?
4-8 mg/dl
Where is phosphorus found?
meat, bone meal, and grain
What are synthetic sources of phosphorus?
monosodium phosphate, dicalcium phosphate, mono calcium phosphate
What is the transport of phosphate dependent on?
1,25 dihydroxyvitamin D
What can cause phosphate deficiency?
vitamin D deficiency, or low P levels
Where is excess phosphorous excreted?
in the urine and saliva
What are plant sources of P often tied up as?
phytate phosphorus
What species group is able to make full use of phytate phosphorus?
ruminants
Why can ruminants utilize phytate phosphorus?
because their microbes can break it down
How is phosphorus absorbed in ruminants?
their salivary secretions remove 30-90g from the extracellular pool and then most is recobered by intestinal reabsorption
What is salivary phosphorus considered in the rumen?
a buffer
What happens if a cow stops chewing?
the ph in the rumen lowers killing the microbes killing the cow
What are diseases associated with phosphorus deficiency?
rickets, osteomalacia, osteoporosis, lactational osteoporosis
What is osteomalacia?
adult rickets
