Phosphorus Flashcards

1
Q

2nd most abundant inorganic element in the body

A

phosphorus

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2
Q

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

A

700g

1%

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3
Q

best source of phosphorus

A

animal products

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4
Q

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

A

phylate (lack enzyme phytase)

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5
Q

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

A

hydroxyapatite

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6
Q

PTH function on phosphorus

A

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

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7
Q

calcitriol function on phosphorus

A

promotes phosphate absorption in small intestine

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8
Q

calcitonin function on phosphorus

A

prevent phosphate resorption from bone

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9
Q

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

A

sugar phosphate backbone

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10
Q

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

A

high-energy phosphate bonds

phosphoanhydride bond in hydrolyzed for energy

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11
Q

acts a _______ within cells by activating certain kinases

A

secondary messenger

  1. PI 4,5 bisphosphate
  2. IP3 (inositol 1,4,5 trisphosphate)
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12
Q

phosphorus ___ pH by removing free hydrogen ions

A

increases (kidney most important)

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13
Q

PTH _____ the amount of phosphate excretion

A

increases

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14
Q

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

A

hypophophatemic

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15
Q

phosphorus can inhibit _______ which would cause a

A

1-hydroxylase

reduce in calcitriol synthesis

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