Phosphorus

Question 1

2nd most abundant inorganic element in the body

Answer 1

phosphorus

Question 2

body stores _____g of phosphorus which makes up ___% total body weight

Answer 2

700g

1%

Question 3

best source of phosphorus

Answer 3

animal products

Question 4

intestinal hydrolytic enzymes cannot free ____ bound phosphates (found in plant base foods)

Answer 4

phylate (lack enzyme phytase)

Question 5

in bone, found complexed with Ca as part of the bone mineral ____

Answer 5

hydroxyapatite

Question 6

PTH function on phosphorus

Answer 6

reabsorption of phosphate from bone, stimulates excretion of phosphorus in urine via kidney

Question 7

calcitriol function on phosphorus

Answer 7

promotes phosphate absorption in small intestine

Question 8

calcitonin function on phosphorus

Answer 8

prevent phosphate resorption from bone

Question 9

as a structural role: phosphorus makes up _______ of DNA and RNA

Answer 9

sugar phosphate backbone

Question 10

energy storage and transfer as ________ ATP, GTP, and creatine phosphate

Answer 10

high-energy phosphate bonds

phosphoanhydride bond in hydrolyzed for energy

Question 11

acts a _______ within cells by activating certain kinases

Answer 11

secondary messenger

1. PI 4,5 bisphosphate
2. IP3 (inositol 1,4,5 trisphosphate)

Question 12

phosphorus ___ pH by removing free hydrogen ions

Answer 12

increases (kidney most important)

Question 13

PTH _____ the amount of phosphate excretion

Answer 13

increases

Question 14

people who take anti-acids give themselves the chance of becoming

Answer 14

hypophophatemic

Question 15

phosphorus can inhibit _______ which would cause a

Answer 15

1-hydroxylase

reduce in calcitriol synthesis