text: <unk>  <unk>  is derived from the transcription product of the proglucagon gene. The major source of<unk>  in the body is the intestinal L cell that secretes<unk>  as a gut hormone. The biologically active forms of<unk>  are:<unk> -(7-37) and<unk> -(7-36)NH2.<unk>  secretion by L cells is dependent on the presence of nutrients in the lumen of the small intestine.  The secretagogues (agents that causes or stimulates secretion) of this hormone include major nutrients<unk>  carbohydrate, protein and lipid. Once in the circulation,<unk>  has a half life of less than 2 minutes, due to rapid degradation by the enzyme dipeptidyl peptidase-4.
option_0: Glucagon-like peptide-1
option_1: Histrelin
option_2: C-peptide
option_3: Growth hormone-releasing hormone
option_4: Thyrotropin alpha
option_5: Bryostatin
option_6: Pentostatin
option_7: Secretin human