extra Flashcards
what causes blood clotting
ca
what has ca sensor
chief cells
what do osteocytes arise from
entombed osteoblasts
central canal in bone
contains blood vessels
unit of bone
osteon
between osteocytes
lamella
holes around osteocytes
canaliculi
time of osteoclast activity
slower response time
calcitriol
bioactive vitamin D
1,12 OH2 vitamin D
what kind of hormone is vitamin D
steroid
what activates kidney hydroxylation enzyme
low ionized calcium and phosphate
PTH
prolactin during lactation
dose dependant resones and slow adn low lasting reposne to calcium
GI absorption
vitamin D and PTH
inc response of bone to PTH (resorption)
what causes hypoparathyroidsim
autoimmuen disease of physical damage to glands
symptoms of hypoparathyroidsm
inc neuromuscular excitability inc nerve permeability to NA
parasthersia
tetany
dangerous bc failure of respiration
secondary cause of hyperparathyroidism
renal disesase or vitamin d deficiency
what does hyperparathyroidism due to vitamin D deficiency cause
rickets in kids
osteomalacia in adults
activates more than 1000 genes
vitamin D
what causes osteoporosis
evey hormone is normal but inc osteoclast and decreases osteoblast
inhibits bone resorption by decreasing osteoclast activity
estrogen and calcitonin