Answers are grounded in this paper and cite their sources.
Cells which are believed to be members of the APUD‐series of endocrine cells have been demonstrated in the bronchial epithelium of foetal lung. Among the common cytochemical characteristics of APUD‐cells were demonstrated: amine content, amine precursor uptake (and decarboxylation), and reactivity to staining with HC1‐toluidine blue and Pb‐H.
No takes yet. Share an insight, caveat, or question.
Esther Häge (1972) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: