Regulation of the Spermatogenetic Cycle in the Common Frog (Rana Temporaria) |
Contents
A Injection of pituitary extracts | 34 |
B Ablation of the adenohypophysis | 45 |
Introduction | 56 |
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Common terms and phrases
ablation active cell nests activity weight tubules adenohypophysis Amphibia Average diameter testis beginning Biol Bufo arenarum cell nests containing common frog cycle of Rana experiment explanation of symbols five frogs Galgano germinal epithelium gland gonado gonadotropic hormones gonadotropin gonadotropin administration half of February half of January high temperatures Houssay hypophysectomy low temperatures meal worms nest in stage normal temperatures November number of cell number of primary Oordt and Grasveld operated frogs pituitary extract primary spermatocytes primary spermatogonia Rana esculenta Rana temporaria Relative Average diameter relative number relative testis weight resting period second half secondary spermatogonia seminiferous tubules sensitivity Sertoli cells Sluiter sper sperm bundles sperm cells spermatids spermato Spermatogenetic activity weight spermatogenetic period spermatogenetic progress spermatogenetic stimulation spermiation period symbols see figs symbols see Table testis of testis testis Spermatogenetic activity testis tubules testis weight tubules unoper unoperated frogs winter Witschi Zool