The parathyroid gland and calcium homeostasis Flashcards
1
Q
What cells produce PTH?
A
Chief cells
2
Q
What other cells are located in the parathyroid are acid producing and have an unkown function?
A
Oxyphilic cells
3
Q
What is the structure of PTH?
A
- 84 amino acid prohormone
- 9500 molecular weight
4
Q
What is the primary action of PTH?
A
Increase plasma Ca2+
5
Q
What vitamin increases plasma calcium?
A
Vitamin D3
6
Q
What hormone decreases plasma calcium?
A
Calcitonin
7
Q
What percentage of Ca2+ is located outside of bone/teeth?
A
1% (mainly intracellular)
8
Q
What percentage of Ca2+ is located in plasma?
A
0.1%
