Steady-state analysis of the factors involved in hormonal control of plasma cakium shows the effect of plasma calcium concentration on hormone secretion and bone transfer functions on the net transfer of calcium out of bone.
FIG. 4-Steady-state analysis of the factors involved in hormonal control of plasma cakium. The ultimobranchial and parathyroid transfer functions represent the effect of plasma calcium concentration on hormone secretion; the bone transfer functions represent the effect of hormone concentrations on the net transfer of calcium out of bone. From Copp.19 (Reproduced through the courtesy of Cambridge University Press, Cambridge, England.)