Calcium/Hard Tissue Flashcards
1
Q
Enamel matrix is ____ and is ___ HA
A
amelogenin; 90%
2
Q
dentin matrix is ____ and is ___ HA
A
collagen; 67%
3
Q
things that promote resorption
A
PTH PTH-related protein Prostaglandin IL-1, IL-6, and TNF prolactin corticosteroids Vitamin D
4
Q
things that inhibit resorption
A
calcium estrogens calcitonin tumor growth factor- beta IL-17
5
Q
how Ca is distributed in serum
A
50% ionized Ca- free Ca- biologically active
40% protein bound- bound to albumin- biologically inactive, not excreted
10% bound to phosphate, bicarbonate, or citrate
6
Q
____ is the primary regulator of Ca levels
A
PTH
7
Q
PTH triggers an increase in ____; production stimulated by ____
A
serum Ca; low plasma Ca
8
Q
32 amino acid protein produced by C-cells that inhibits bone resorption
A
calcitonin
9
Q
Ca is absorbed in the ____; active transport regulated by ____; transport based on relative ____
A
small intestine; vitamin D; serum/gut levels
