420 



PHYSIOLOGY OF GONADS 



. (i 1.; .Mnii-i -(iiiiiiit Ill III ill - iiiir ~|icciiiii'ii. Ill, muilii Ml Kill, and prepara- 

 tion as Fig. 6.39). Suprunuclcur icgiuu of au epilht'lial c-ell ; nucleus at the hottoui; numerous 

 membrane-bound vesicles with secretory granules in the larger vesicles; arrows indicate some 

 of the parallel arrays of smooth-surfaced Golgi membranes. (From H. W. Deane and K. R. 

 Porter, unjiuhlished.) 



lated to age in the response of cultured 

 mouse ventral prostate to testosterone pro- 

 pionate. The Long-Evans and Sprague- 

 Dawlcy strains of rats differ in respon- 

 siveness of the ventral prostate of adult 

 hypojihysectomized castrates to testosterone 



propionate (Lostroh and Li, 1956). Species 

 differences in rate of retrogression of acces- 

 sory glands in adult castrates are marked. 

 As reported above, changes in histologic 

 structure occur rapidly in rats, more slowly 

 and less uniformly in mice (Howard, 1939), 



