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7.4.2.2. Autonomic nervous system

Autonomic nervous system

The vegetative or autonomic nervous system is responsible for regulating and coordinating functions that are involuntary, unconscious and automatic.

The autonomic nervous system is made up of components: the sympathetic and parasympathetic nervous systems, with antagonistic functions in order to maintain body homeostasis.

  • Sympathetic Nervous System: is responsible for activating most of the body's organs to work more intensely, except those related to digestion. It acts when the body is under stress or danger, preparing the body to face adverse situations. It leads to an  increase  in energy expenditure.
  • Parasympathetic Nervous Systemrelaxes  the activity of most organs, except those related to digestion. It produces changes that involve a decrease in energy expenditure and the body returns to its normal state of relaxation.
Sistema nervioso simpático y parasimpático
http://3.bp.blogspot.com/-3UznyjI9ZWg/TsP-n_4S0EI/AAAAAAAAAOw/UxOH1CL8DkU/s1600/sistema+autonomo.gif

Answer in your notebook

7.8.- What is the function of the Autonomic Nervous System?


         

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Biology and Geology teaching materials for Compulsory Secondary Education (ESO) and Baccalaureate students.