Lecture 26 - Bone Health, Falls and Fractures Flashcards
by what age is the skeleton completely hardened
25
how many bones are in the human body
206
bone resorption is the action of what
osteoclasts and parathyroid hormone
bone deposition is the action of what
osteoblasts and calcitonin
bone resorption and bone deposition is regulated by
thyroid and parathyroid glands
an osteoblast ….
forms new bone tissue
an osteoclast …..
breaks down old bone tissue
what plays vital roles in bone development, growth and repair
vitamin A, vitamin D, calcium and other hormones
rates of bone growth is highest when
infancy and pubertal growth spurt
velocity of bone growth doubles when
adolescence critical period
~40% of peak bone mass is laid down when
end of puberty
at age 20 what % of peak bone mass is attained
90-95%
what happens to bone mass after your mid 30s (also how does men and women bone mass change throughout their life)
you begin to slowly lose bone mass
women lose bone mass faster after menopause, but it happens to men too
what are the determinants of bone strength
- bone mineral density
- geometry
what is the most important effect of stress on the bone and what is this
strain
measurement of deformation of bone to external load
what is said about your ground reaction forces if you are lighter
the lighter you are the smaller your ground reaction forces are
peripheral skeleton bone strength is positively associated with what
total and dairy protein intake in healthy postmenopausal women