Ca and PO4 Physiology

Question 1

what effect does PTH (parathyroid hormone) have on Ca and PO4?

Answer 1

increases Ca

decreases PO4

Question 2

decreased levels of Ca causes what to happen to PTH levels?

Answer 2

increases PTH levels

Question 3

what effect does PTH have on HCO3 levels ?

Answer 3

decreases

- increases excretion of HCO3

Question 4

calcitriol production is stimulated by what?

Answer 4

decreased Ca, PO4

increased PTH

Question 5

what effect does calcitriol have?

Answer 5

increases Ca and PO4 absorption at the gut

decreases PTH release

Question 6

what effect does magnesium have on Ca?

Answer 6

magnesium prevents PTH release so decreases Ca

Question 7

what does alkalosis do to the level of Ca?

Answer 7

alkalosis decreases albumin protonation and increases Ca binding so reduces the level of Ca in the serum

Question 8

what effect does prolonged tourniquet

Answer 8

increases albumin and increases Ca

Question 9

if albumin decreases what happens to the level of Ca?

Answer 9

Ca also decreases