title: Participation of hypothalamus in the response of interrenal tissue to stress of frog Rana ridibunda.
abstract: Frogs of species Rana ridibunda were divided into 6 groups: 1. control; 2. sham operated; 3. with transsection (TS) in front of the median eminence; 4. with TS under optic chiasm; 5. with TS in front of the optic chiasm; 6. hypophysectomized. On the experimental day a half of the animals of each group was stressed by restraint and the level of plasma corticosterone was measured. The results show that TS in front of the median eminence, under optic chiasm and in front of the optic chiasm increased the resting levels of corticosterone in plasma. The most intense response to stress was observed in frogs with TS in front of the median eminence and optic chiasm, while that after TS under optic chiasm was less. Hypophysectomized frogs responded to stress by increase of corticosterone level in plasma.
mesh_terms: D000302:Adrenal Cortex / Q000502:physiology* / Q000503:physiopathology; D000818:Animals; D001001:Anura; D003345:Corticosterone / Q000097:blood*; D005260:Female; D007031:Hypothalamus / Q000502:physiology* / Q000503:physiopathology; D008297:Male; D008473:Median Eminence / Q000502:physiology; D009897:Optic Chiasm / Q000502:physiology; D011898:Ranidae; D013312:Stress, Physiological / Q000503:physiopathology*
chemical_list: D003345:Corticosterone