Page 352 - Color Atlas of Biochemistry

Connective tissue 343

A. Functions of calcium B. Bone remodeling

Osteoblast Calcitriol
Calcitonin
Mineralization

Muscle Ca 2 Precursor
con- cells
traction
Parathyroid
Signal Hydroxy- Collagen I hormone
transduction apatite
Ca 2
Ca 2
Growth Estrogens
factors

Nerve H
conduction Cyto-
Exocytosis kines

H
Precursor
Protein cells
function
HCO 3 H 2 O

Ca 2 CO 2
complex
Osteoclast Calcitonin

C. Calcium homeostasis
Calci-
600 – 900mg Calcitriol 1000000 mg Stock
tonin
1000 mg · d -1

oder
Hydroxy-
Parathyroid hormone 500 mg · d -1 apatite
500 mg · d -1

Calcitriol Bone
Calci- Parathyroid
tonin hormone

Filtration Kidney
300mg · d -1
till 150mg · d -1
10 000 mg · d -1
9 850 mg · d -1

Resorption

Calci- Parathyroid
850mg · d -1 triol hormone

Intestine Blood 150 mg·d -1

Koolman, Color Atlas of Biochemistry, 2nd edition © 2005 Thieme
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