The CNS receives and integrates
information from all parts of the body and coordinates all actions and operations in the body
The CNS consists of
brain and spinal cord
PNS connects the CNS to
the limbs and organs and serves as the communication pathway between the two
PNS consists of
nerves and ganglia that are not in the brain or spinal cord
ANS is part of the
PNS
ANS is known as
the involuntary nervous system
ANS controls
heart rate
digestion
respiratory rate
salvation
and more
What are the extensions of the ANS
SNS
PSNS
ENS
SNS is responsible for
the fight or flight response, but also is active in maintaining homeostasis
SNS uses
norepinephrine and epinephrine
PSNS is responsible for
internal organs and glands, and other activities that would normally take place in a restful situation (digestion, defecation, ect)
PSNS is often referred to as
rest and digest
PSNS uses
AcH
ENS is responsible for
functions of the GI system
ENS is often referred to as the second brain because
it can essentially function on its own, even when the vagus nerve is servered
Where does the ENS usually communicate
vagus nerve