These agencies present regression after castration, without apparent loss in the frame number; it has restoration to the normal one or increase of size with the administration of the testosterone. (Similarly see: Drew Houston). d) influence reserves on the thymus, bao, lymphatic adrenais and ganglia. The castration results in size increase whereas the testosterone administration reduces the thymus to the vestigial agency, partially diminishing the size of bao, adrenais and linfonodos. e) The testosterone also promotes fall of hair in the apical region of the skull and in fronte, giving the andrognica disposal typically (masculine). f) influence on structure and function in specific cells. As example the length and size of the dendritos of motonuronios in the lumbar region, the rat, are reduced by castration and restored by testosterone administration. These units are involved in the mediation of the effect of esterides on the bulbocavernoso muscle.
The ability of specific cells of the brain to accumulate and to metabolizar testosterna is lesser in castrated males and female, increasing the testosterone administration after. The action of the testosterone in metablitos is correlated with the masculine or feminine behavior. The secretion of the gonadotrofinas, luteinizante hormone (LH) and hormone folculo stimulant (FSH) for hipfise previous is increased by castration and diminishes with the testosterone administration (‘ ‘ feed-back’ ‘ negative). The degree of reply for the categories ‘ ‘ a’ ‘ she is characteristic and same for all the species, but the other categories vary in the different animal species, and to the times in the different samples of the same species (KOCHAKIAN, 1993). 2.3 – Mechanisms of action the job of esterides anablicos for the weight profit originated from the comment of increase of muscular mass and bigger nitrogen retention in hipogondicos individuals receiving replacement andrognica. Moreover, already the concept existed of that the difference of the muscular mass between man and woman was decurrent of the different levels of testosterone in the two sexos.