Fig. 3. Increase in tissue cyclic guanosine monophosphate (cGMP) concentration after exposure to 10−5m sodium nitroprusside (SNP). The arterial rings were subjected to normoosmotic or hyperosmotic challenges with three concentrations of iohexol (5, 20, 100%). Rings were incubated in saline or 10−5m of SNP. Error bars represent SE. *Significant differences in control and SNP groups.
