Calcium Flashcards
What form of calcium is in your bone
Ca:PO4 complex
What happens when calcium passes through glomerular filtrate
98% is passively reabsorbed
What are the major regulatory sites of calcium
Bone, kidney, small intestine
Where is half of your calcium in your blood
Protein bound
How do you calculate K
Ca x PO4
what is the normal range for K
30-50
What happens when K is > 60-70
Ca salts are deposited as Ca:PO4 complex
What happens when K is below 30
bone reaborption
What is the hormonal control of calcium
Parathyroid gland secreting PTH
Is PTH the same throughout species
Yes
What does PTH do to bone
Increases bone resorption
What does PTH do to the kidney
Stimulates activation of Vit D
Increases tubular calcium reabsorption
decreases tubular phosphate reabsorption
What does PTH do to the intestine
Calcitrol increases intestinal absorption of calcium
What does Calcitonin do
Opposite of PTH
Decrease levels of Ca in blood by inhibiting bone reabsorption
Decreases tubular calcium reabsorption
How is Vitamin D different than other vitamins
made in one place and acting at others
meets criteria for hormone