Assertion: endocrine gland's secretion | /r/HasProperty | polypeptide
Facets:
value: often
type: TEMPORAL
Source sentences:
text: These secretions, which are often polypeptides (compounds similar to proteins but composed of fewer amino acids), pass along nerve-cell extensions, or axons, and are typically released into the bloodstream at special regions called neurohemal organs, where the axon endings are in close contact with blood capillaries.