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Calcium(mineral)
- Most abundent mineral in the body
- Ions are vital to:
- Membranes
- Neurons
- Muscle cells(contraction)-Heart muscle
Calcitriol
- Made in kidneys
- Helps absorb calcium and phosphorus from the digestive tract and increases blood calcium levels
- Need vitamin D3(cholecalciferol) to make(made in skin)
Calcitonin
- Location: Thyroid Gland(C cells)
- Effects: Inhibits osteoclasts activity
- Promotes calcium loss at kidneys
- Reduces calcium ion concentrations in body fluids
Parathyroid hormones(PTH)
- Location: Parathyroid Glands
- Functions: Stimulates osteoclast (and osteoblast lesser degree) activity
- Elevates calcium ion concentration in body fluids
Growth hormones
- Location: Pituitary Gland
- Functions: Stimulates osteoblast activity and the synthesis of bone matrix
Thyroxine
- Location: Thyroid Gland(follicle cells)
- Functions: W/Growth hormone, stimulates osteoblasts activity and the synthesis of bone matrix
Sex hormones
- Location: Ovaries(estrogens)
- Testes(androgens)
- Functions: Stimulates osteoblast activity andsynthesis of bone matrix
Factors that contribute to healthy bones
- Vit C-required for collagen synthesis
- Vit A- stimulates osteoblast activity
- Vit K&B12- helps synthesis bone proteins
- Growth Hormones&thyroxine- stimulates bone growth
- Estrogens&Androgens- stimulates osteoblasts in puberty which leads to the closing of epiphyseal cartilage
- Calcitonin&Parathyroid homone(w/cacitriol) regulate calcium & phosphate levels

Author

AHSJ1029

72733

Card Set

Alexis

Description

Hormones(Calcium Homeostasis)

Updated

2011-03-14T02:14:51Z

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