Cortical bone
has a dense structure
The mixture of calcium and phosphorus that mineralizes bone is called
hydroxyapatite
Accumulation of bone mass occurs primarily during childhood and adolescence. Later in life, the rate of bone degradation exceeds the rate of bone synthesis. For average, healthy men and women, gradual bone loss begins around age
30
Postmenopausal women are more prone to fractures than premenopausal women primarily because
low estrogen levels accelerate bone loss.
The difference between osteopenia and osteoporosis is
the bone loss of patients with osteopenia is not as severe as that of patients with osteoporosis.
In the body, 99 percent of calcium is found in
bones and teeth.
Calcium absorption is increased by all of the following except
-pregnancy.
-old age.
-the presence of lactose in the gastrointestinal tract.
-the presence of acid in the gastrointestinal tract.
old age
The most nutrient-dense calcium food source is
dairy
The nutrient that can be considered both a vitamin and a hormone is
vitamin D
Vitamin D is unique among the vitamins because
it can be formed in the body by skin exposure to the sun.
The childhood disease rickets is due to a deficiency of
vitamin D
Soft bones resulting from a deficiency of vitamin D in adulthood is known as
osteomalacia.
Magnesium is required for
-bone health.
-cardiovascular health.
-energy-yielding reactions.
-All of these choices are correct.
All of these choices are correct.
This mineral can be protective for the teeth when introduced into the water supply; however it can cause tooth mottling when consumed in high quantities.
copper
_______________ is a disease in which bone mass is lost to such a degree that fractures can occur in bones, especially the wrist, spine, and hips.
Osteoporosis