Effects of Age Upon the Physiological Behavior of Calcium in Cattle

Publisher Website
Google Scholar
Abstract
The absorption and movement in the body of labeled Ca was studied as a function of age utilizing 36 cattle. Consideration was given to the use of Ca45 data for the interpretation of the behavior of the stable Ca normally present. The typical excretion rate of unabsorbed Ca was found to show about a 3 fold increase for aged animals. Equations presented for the disappearance of Ca45 from blood as a function of age indicated that the rate of exchange of Ca ions between blood and other compartments decreased significantly with increasing age. From the comparative specific activities of soft tissue and bone it was possible to estimate the relative percent of exchangeable Ca in the skeleton of the animals; this value tended to decrease with age.

This publication has 10 references indexed in Scilit: