The function of the pyloric sphincter is to a release acid chyme into the duodenum in periodic squirts. b release pancreatic secretions into the duodenum when chyme is present. c release bile into the duodenum when chyme is present. d retain acid chyme in the stomach until pepsin digestion is complete. e release bile and pancreatic secretions into the duodenum when chyme is present.

as the gila monster consumes the eggs or young of the desert cottontail and gambel's quail, thus its main food supply is only accessible for a restricted time duration every year. however, for this, the gila monsters exhibit three adaptations, which elevate their survival rate in the desert condition.  

first, is that they possess huge bodies, and can consume greater concentrations of food during a small period. secondly, they require to feed infrequently as they can accumulate fat in their tails. ultimately, their rate of metabolism is very low, so that they can burn their reservoirs of fat gradually.