Study Set:
The nerve system
6
•
Peripheral Nervous System
Cranial nerves
•
12 pair
•
Attached to undersurface of brain
Spinal nerves
•
31 pair
•
Attached to spinal cord
Somatic Nervous System (voluntary)
•
Relays information from skin, sense organs &
skeletal
muscles to CNS
•
Brings responses back to skeletal muscles for
voluntary
responses
Autonomic Nervous System (involuntary)
•
Regulates bodies involuntary responses
•
Relays information to internal organs
•
Two divisions
o
Sympathetic nervous system – in times of
stress
§
Emergency response
§
Fight or flight
o
Parasympathetic nervous system – when body is at rest or with normal functions
§
Normal everyday conditions