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.
Late tone after serial administration of bisacodyl, atropine, N-nitro-L-arginine (L-NNA), MRS2500, and tetrodotoxin (TTX). (A) Late tone in the longitudinal muscle. (B) Late tone in the circular muscle. The Wilcoxon signed-rank test was used to evaluate the effects of each drug by compare values to the previous one.: *P < 0.05 and **P < 0.01.
