Intercellular junctions and exocytosis in the vas deferens of Ascaris. Academic Article uri icon


  • The membranes of the secretory vas deferens cells in Ascaris were examined using freeze-fracture and lanthanum impregnation techniques. The detection of gap junctions and apical septate junctions extends the knowledge of the occurrence of these intercellular junctions to include the Nematoda. Membrane reorganization resulting in exocytosis was also observed in vas deferens cells from male worms recovered in copula. The membrane alterations include the absence of microvilli at the site of membrane fusion concomitant with the focal clearance of intramembranous particles from both lumenal and secretory granule membranes. This study provides evidence to support a second membrane fusion mechanism in the same experimental animal. © 1980 Academic Press, Inc.

published proceedings

  • J Ultrastruct Res

author list (cited authors)

  • Burghardt, R. C.

citation count

  • 10

complete list of authors

  • Burghardt, RC

publication date

  • May 1980