Calcium Represents Almost 2 Percent of the Body Weight

Calcium represents almost 2 percent of the body weight,

A) and its absorption from the intestine is decreased by vitamin D and lactose.
B) but an increase in its absorption from the intestine may occur if excessive amounts of fiber or phosphorus exist in the diet.
C) with 85 percent of this amount found in the skeleton, 5 percent utilized for tooth formation, and the remainder influencing human metabolism.
D) and the physiological functions take precedence over the formation of bone tissue.