The following are true about parathyroid hormone a. it is an 84 amino acid peptide hormone
b. it increases calcium absorption from the gastrointestinal tract
c. it acts on a cell surface receptor that increases intracellular
cyclic AMP
d. all above
b. it increases calcium absorption from the gastrointestinal tract
c. it acts on a cell surface receptor that increases intracellular
cyclic AMP
d. all above