The receptive field of a receptor is the entire area through which the sensitive ends of the receptor cell are distributed. an relationship exists between the of the receptive field and our ability to identify the exact location of a stimulus. if the receptive field is , precise localization of the stimulus and sensitivity are determined easily. in contrast, a receptive field detects only the general region of the stimulus.

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.