In cholera: Subunit ____ stimulates adenyl cyclase increased level of intracellular cyclic AMP resulting in hypersecretion of water & electrolytes. Micro Gram - Vibrio In cholera: Subunit ____ stimulates adenyl cyclase increased level of intracellular cyclic AMP resulting in hypersecretion of water & electrolytes. Answer: A Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+