6,273
edits
Changes
Autonomic Nervous System - Anatomy & Physiology (view source)
Revision as of 15:50, 7 March 2011
, 15:50, 7 March 2011→Autonomic Nervous System: Basic Principles
The autonomic nervous system is made up of the ''Sympathetic Nervous System'' (SNS) and the ''Parasympathetic Nervous System'' (PNS). The SNS is activated during critical situations, such as fight or flight responses whilst the PNS is activated whilst at rest, such as during food digestion after eating.
The autonomic nervous system is made up of the ''Sympathetic Nervous System'' (SNS) and the ''Parasympathetic Nervous System'' (PNS). The SNS is activated during critical situations, such as fight or flight responses whilst the PNS is activated whilst at rest, such as during food digestion after eating.
==Autonomic Nervous System: Basic Principles==
==Autonomic Nervous System: Basic Principles==
Within the somatic nervous system, the link between the skeletal muscle cell and the central nervous system consists of a single nerve fibre. Within the ANS, efferent signals are transmitted by two neurons between the CNS and the effector cells. The first neuron is a preganglionic neuron with a cell body in the CNS (either brain stem or spinal cord). The second neuron is postganglionic and connects the effector cell with the ''autonomic ganglia'' found outside the CNS.
==[[Sympathetic Nervous System - Anatomy & Physiology|Sympathetic Nervous System]]==
==[[Sympathetic Nervous System - Anatomy & Physiology|Sympathetic Nervous System]]==