Greg Foot explains the role of the hormone ADH on the permeability of the kidney tubules - regulating the water levels in the body

Homeostasis maintains optimal conditions for enzyme action throughout the body, as well as all cell functions.

In the human body, these include the control of:

  • blood glucose concentration
  • body temperature
  • water levels

These automatic control systems may involve nervous responses (nervous system) or chemical responses (endocrine system ).

Nervous system

The human nervous system consists of:

Diagram of the human body: central nervous system and peripheral nervous systemA diagram showing the central and peripheral nervous system