[ Back to EurekAlert! ]  Contact: Lee J. Siegel University of
Utah  Diagram of Exocytosis and Endocytosis  Caption: This
diagram depicts both exocytosis (left) and endocytosis (right).
On top is a nerve cell that is sending a chemical nerve signal
to the nerve cell on the bottom. Within the top nerve cell,
vesicles -- which are tiny bubbles (orange) filled with
neurotransmitters (red dots) move toward the end of the nerve
cell and one (with down arrow) fuses with the cell wall and
releases neurotransmitters into the synapse between nerve cells
and toward a mass of receptors (red cross-hatching). The right
side of the image shows a recycled vesicle (yellow) in the
process of forming at the cell wall and then separating from it
(up arrow).  Credit: Janet Iwasa, University of Utah.  Usage
Restrictions: None  Related news release: How our nerves keep
firing  [ Back to EurekAlert! ]