spacer gif spacer gif spacer gif spacer gif spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

Right arrow Help viewing high resolution images
Right arrow Return to article

(Downloading may take up to 30 seconds.
If the slide opens in your browser, select File -> Save As to save it.)
Click on image to view larger version.


Figure 6


Fig. 6. Effects of D1-like dopamine (DA) receptor agonists and antagonists on transepithelial potential differences (Vte) of posterior gills of Chasmagnathus granulatus. (A) 10 µmol l-1 DA applied after pretreatment with the D1 antagonist, SCH23390 (10 µmol l-1) produced the typical stimulatory phase, increasing Vte (*P<0.05; N=5), but not the subsequent inhibitory phase observed in control conditions. (B) Addition of the D1 agonist fenoldopam (15 µmol l-1) to posterior gills previously stimulated with the adenylyl cyclase activator forskolin (Forsk; 10 µmol l-1) produced a partial reversion of the forskolin-induced increase of Vte (*P<0.05; N=6; mean was obtained 100-120 min after the beginning of the experiment). Dotted line represents mean control value obtained after 20 min of perfusion with 30{per thousand} saline.





Right arrow Return to article