Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
ATP released from parasympathetic nerve varicosities activates P2X receptors located on UBSM. Ca2+ influx through the P2X receptors underlies the purinergic Ca2+ transients. The membrane potential depolarization arising from Ca2+ and Na+ influx through P2X receptors would open VDCCs allowing significant Ca2+ influx into the cell.
