Fig 5. Sensitivity of transients on parameter models.

Open green circles represent all the experimental results, including young unstressed, young stressed, aged unstressed, and aged stressed worms. For each plausible parameter set 100 samples are created, in which the parameter values are randomly perturbed by ±25%. For each sample, the maximum magnitudes of the “on” and “off” responses are recorded and plotted as filled black circles. The distribution of randomly perturbed model results shows that the mathematical model can capture the variations that are observed in experimental results. Moreover, the modeling results are observed to be dense/sparse where the experimental results are dense/sparse.