CorticosteroneFecesAdrenocorticotropic HormoneAdrenalectomyPituitary-Adrenal SystemHypothalamo-Hypophyseal SystemRestraint, PhysicalAdrenal GlandsStress, PhysiologicalMetyraponeCorticotropin-Releasing HormoneReceptors, GlucocorticoidMifepristoneStress, PsychologicalTranscortinReceptors, MineralocorticoidRats, Sprague-DawleyGlucocorticoidsAdrenal CortexRats, Wistar11-beta-Hydroxysteroid DehydrogenasesParaventricular Hypothalamic Nucleus