Table 1

Time delay between onset of depolarization of epithelium and relaxation of smooth muscle after intra- and extraluminal additions of 240 mOsM NaCl, KCl, or sucrose

Agent	Delay
	s
Intraluminal
NaCl	13.7 ± 2.2
KCl	6.4 ± 1.4^1-160
Sucrose	14.8 ± 2.6
Extraluminal
NaCl	28.7 ± 1.8^1-150
KCl	17.0 ± 1.7^1-150 ^, ^1-160

↵1-150 Significantly longer than after intraluminal addition of the same salt.
↵1-160 Significantly shorter than after NaCl administration; n = 6–8 for NaCl and KCl; n = 3 for sucrose.