Exam 4: MNT for CVD Bone health Flashcards
Recognize components of bone
Proteins – collagen, osteocalcin
* Hydroxyappatite – calcium and phosphate
Cortical bone = 80% of
skeleton
⚬ Shafts of long bones
* Trabecular bone = 20% of
skeleton
⚬ Knobby ends of long
bones
⚬ Iliac crest of pelvis
⚬ Wrists, scapulas,
vertebrae
⚬ Spongy, less dense
⚬ More responsive to
changes in estrogen
functions of osteoblasts
bone formation by synthesis of matrix proteins, collagen type 1 osteocalcin
functions of osteoclasts
bone resorption, degradation of bone tissue via enzymes and acid secretion . secretion of cytokine that act on osteoclasts
how does the body maintain calcium homeostasis
99% of body calcium = in bones
* 1% = extracellular fluids (serum); critical to life processes
* Calcium is drawn from bones when calcium intake is
inadequate
* Blood calcium concentration regulated by
explain role of PTH in bone remodeling
explain role of estrogen in bone remodeling
explain role of aging in bone remodeling
Make recommendations for intake of major vitamins to promote optimal bone health
Make recommendations for intake of major minerals to promote optimal bone health
Make recommendations for intake of major
protein to promote optimal bone health
Identify factors that influence the synthesis of vitamin D and
conversion to the active form
Describe the effects of alcohol diets on bone
Describe the effects of caffeine on bone
Describe the effects of soft drinks on bone
Describe the effects of
sodium on bone
