It is a dynamic steady state, all of function or regulation in cells or organs contribute to maintain homeostasis. (core theme)
The conception has been now extended to the understanding of all physiological activities constancy.
Internal environment was firstly introduced by Claude Bernard at 1870s. It means the liquid environment in which cells live, that is, extracellular liquid.
Autoregulation: organ or tissue itself directly and
adaptively response to stimulus. character: directly, limited
Positive feedback
command
control
effecter
Regulation for physiological function
Nervous regulation
basic manner: reflex character: rapidly, accurately, momentarily
Humoral regulation
basic manner: hormone, local liquid factors character: slowly, extensively, persistently