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15 Cards in this Set

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  • Back
Parathyroid hormone from?

Function?
from chief cells.

increases ECF Ca by bone release and renal reabsorption
Calcitonin from?

function?
c cells in thyroid

decreases ECF Ca by bone deposition and renal excretion

Opposite of PTH
ECF Ca determined by? 3


regulated by? 2
intestinal reabsorption
renal excretion
bone uptake/release

PTH and calcitonin
hypercalcemia? 7
depressed CNS
depresses muscle activity
decreased QT
constipation
no apetite, peptic ulcers
decreased GI motility,
kidney stones
hypocalcemia?
excited CNS
tetany (6-9.4)
Ca forms

only .1 percent available
41-protien bound
9-anionic
50-ionized-available
Vitamin D affect on Ca?

must be concerted to?
increased GI absorption of Ca and phos

decreases renal excretion of ca and phos

1,25 hihydroxycholcalciferol(liver)
califerol?

where formed?
Vitamin D3

skin
high PTH?

hyperparathyroid
rapid increase in serum Ca from bones

weak bones

look for high alk phos secondary to osteoblasts
low PTH

hypoparathyroid
tetany, low serum Ca, but strong bones

tx with vitamin D
what mediates the effects of PTH?

what controls PTH levels?
cAMP

serum Ca concentration
Vitamin D deficiency in children?
rickets-tetany, weak bones

expose to sunlight (vit d3)
a decrease in the bone matrix?

causes?
osteoporosis

lack of vit C, exercise, age, cushings, malnutrition, low estrogen
a decrease in the bone calcification?
ostomalacia, rickets
teeth
main body-dentin
mentin lines tooth socket
28-32