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Bones
Hormones effecting bone growth
17
Physiology
Undergraduate 2
11/14/2010

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Term
Calcitriol
Definition
Promotes Ca2+ and phospahte ion absorbtion ialong digestive tract
Term
Growth Hormone
Definition
Stimulates osteoblast activity and synthesis of bone matrix
Term
Thyroxine
Definition
w/ growth hormone. Stimulates osteoblast activity and synthesis of bone matrix
Term
Sex hormones
Definition
Stimulates osteoblast activity and synthesis of bone matrix
Term
Parathyriod hormone
Definition
Stimulates osteoclast (and blasts) activity
Elevates Ca2+ concentration in body fluids
Term
Calcitonin
Definition
Inhibits osteoclast activity, promotes ca2+ loss at kidneys, reduce ca2+ ion concentration in body fluids.
Term
Calcitriol
-location
Definition
kidneys
Term
Growth Hormone
location
Definition
Pituitary gland
Term
Thyroxine
-location
Definition
Thyroid gland
Term
Calcitonin
-Location
Definition
Thyroid glands
Term
PTH + calitriol: rate of intestinal absorbtion increase
Definition
I:Factor that increases blood Ca2+ levels
Term
Kidney retain Ca2+ ions
Definition
k:Factor that increases blood Ca2+ levels
Term
PTH- Osteoclasts stimulated to relase stored ca2+ ions from bone
Definition
Bone: Factor that increases blood Ca2+ levels
Term
Calcium concentration
Definition
8.5mg/dL-11mmg/dL
Term
decreased PTH + calitriol: rate of intestinal absorbtion decreases
Definition
I:Factor that decrease blood Ca2+ levels
Term
Kidney allow Ca2+ loss
Definition
K:Factor that decrease blood Ca2+ levels
Term
Calcatonin +
Osteoclasts inhibited while osteoblasts continue to lock ca2+ ions in bone matrix
Definition
Bone: Factor that decrease blood Ca2+ levels
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