Answer:
Messenger RNA on the ribosomes binds amino acids into a peptide chain called a preprohormone. the chain is directed into the ER lumen by a signal sequence of amino acids
-enzymes in the ER chop off the signal sequence, creating an inactive prohormone
-the prohormone passes from the ER through Golgi
-secretory vesicles containing enzymes and prohormone bud off the golgi. the enzymes chop the prohormone into one or more active peptides
-vesicle releases contents by exocytosis
-hormone moves into circulation for transport to its target
