Struggle Between Them Is Developed On Two Tiny

Struggle between them is developed on two tiny arenas - in two kernels . Unlike the majority of others, nervous cages of these kernels are highly sensitive to sexual hormones, especially one of kernels so-called . And as soon as in blood of infant rats-males appears , it gets in . Here also there is a key event of a sexual differentiation; for ever switches off in nervous cages those genes that code synthesis of fibers-receptors for sexual hormones. Having lost receptors, cages become deaf persons to voices of a female hormone. Cages of other kernel - so-called - at males keep such receptors. And at females the sexual hormones appearing later, have not time to "deafen" nervous cages of both kernels which, hence, keep responsiveness to hormonal chemical signals. the kernel at males also becomes later the major centre of sexual behaviour, and at females - both female sexual, and parent. In particular, the kernel at individuals of a female appears capable to cyclic regulation of activity of a hypophysis.