This is unquestionably to be interpreted as a case of hormone action.
His mother's face, still faintly shiny with hormone cream, turned toward him.
This gland is now known to manufacture and pour out into the blood a hormone which is a regulator of metabolism.
If the gland is inactive and does not secrete enough of the hormone, there is a reduction in the metabolism.
Menopause is not a disorder but a natural condition of aging that involves changes in hormone levels in the body.
Our modern conception of hormone action shows certain resemblances with this theory.
Doubtless plants produce in their leaves a hormone which directs certain enzymes that conduct wound repair by cell division.
The hormone might conceivably modify the germ-plasm but if so, it would more likely be in some wholly different way.
This hormone is the result of the action of hydrochloric acid upon some substance in the intestinal wall.