United States or Luxembourg ? Vote for the TOP Country of the Week !
If the inherited or congenital process of dislocation requires the presence of hormones produced by a normal testis, then we can understand why a defective testis does not descend completely, because it does not produce the hormone which is necessary to stimulate the hereditary mechanism to complete dislocation.
The results of Steinach, if confirmed, would prove conclusively that the ovaries and testes produce hormones which determine the development of all the sexual characters, not merely physical but psychical. He adopts the view that the interstitial cells or gland are the source of the active hormone.
The second dentition itself is an expression of a certain internal secretion wave passing through the cells, an increase of action of some hormones, a decrease of others. And a consciousness of physical sexuality appears, while the outlines of character, hitherto mere tracings, become firmer, heavier, quasi-indelible lines.
And the condition of the adrenal will be ascertained in the types that tire easily, and that seem unable to make the effort necessary or desirable. Periodic seasonal and critical fluctuations in the equilibrium among the hormones will have to be taken into account in the explanation of what have hitherto been put down to laziness, naughtiness, stupidity, or obstinacy.
Then as each somatic cell is descended without segregation from the fertilised ovum, we may suppose that the presence of the sex-chromosomes in the somatic cells themselves in some way determines whether male or female characters shall develop, without the aid of any hormones from the gonads.
Excessive stimulation or depression of an endocrine will disturb the whole chain of hormones, and the vegetative system, and their echoes in the psyche.
Closer observation, however, reveals points of differentiation and signs of the coming potencies of the other hormones. During the second period, up to puberty, these marks of the deeper underlying forces of the personality make themselves more and more felt. The thymus, like a brake that is becoming worn out, continues to function in a progressively weaker fashion.
Only in recent years has science discovered that these secondary sexual characters are brought about by the agency of these internal secretions or hormones, passed from the reproductive glands into the circulating blood.
To say that certain mutations consist of new factors which only the development of characters in the soma when the part of the soma concerned is stimulated by a hormone, is a mere assertion unsupported at present by any evidence. No one would suggest that the hormones from the testis should be regarded as in any sense the origin of the antlers of a stag.
Increased production follows increased fertilization. Natural disability must vary similarly with a perversion or improper mixture, deficiency or absence of the hormones that combine in natural ability. It is assumed as a matter of course that the brain itself is there, which, to carry out our analogy, means that the crude soil or earth is there.
Word Of The Day