porosome
A permanent cup-shaped structure at the cell plasma membrane in secretory cells. Following a secretory stimulus, secretory vesicles transiently dock and fuse at the base of porosomes and release intravesicular contents dictated by the turgor pressure generated from the swelling of secretory vesicles.
GO:0110165
cellular anatomical structure
is_a
GO:0005886
plasma membrane
part_of