Phosphorus Flashcards
2nd most abundant inorganic element in the body
phosphorus
body stores _____g of phosphorus which makes up ___% total body weight
700g
1%
best source of phosphorus
animal products
intestinal hydrolytic enzymes cannot free ____ bound phosphates (found in plant base foods)
phylate (lack enzyme phytase)
in bone, found complexed with Ca as part of the bone mineral ____
hydroxyapatite
PTH function on phosphorus
reabsorption of phosphate from bone, stimulates excretion of phosphorus in urine via kidney
calcitriol function on phosphorus
promotes phosphate absorption in small intestine
calcitonin function on phosphorus
prevent phosphate resorption from bone
as a structural role: phosphorus makes up _______ of DNA and RNA
sugar phosphate backbone
energy storage and transfer as ________ ATP, GTP, and creatine phosphate
high-energy phosphate bonds
phosphoanhydride bond in hydrolyzed for energy
acts a _______ within cells by activating certain kinases
secondary messenger
- PI 4,5 bisphosphate
- IP3 (inositol 1,4,5 trisphosphate)
phosphorus ___ pH by removing free hydrogen ions
increases (kidney most important)
PTH _____ the amount of phosphate excretion
increases
people who take anti-acids give themselves the chance of becoming
hypophophatemic
phosphorus can inhibit _______ which would cause a
1-hydroxylase
reduce in calcitriol synthesis