The Divisions of the Nervous System Flashcards
what does the nervous system do?
it controls behavior
how does the nervous system control behavior?
it collects, processes and responds to information from the environment
what else does the nervous system control?
it controls physiological processes
how does the nervous system control physiological processes?
it coordinates the working of different organs
The Central Nervous System
The Brain
The Spinal Cord
The Brain…
maintains life by controlling vital functioning
The Brain is where the
center of awareness/cerebral cortex
the cerebral cortex is
highly developed
The Spinal Cord relays
information between the body and the brain
The Spinal Cord is made up of
pairs of spinal nerves that connect to the rest of the body
If the Spinal Cord suffers any damage…
there isn’t any relay below that point.
The Spinal Cord has circuits of
nerves that can respond reflexively
what is the Peripheral Nervous System?
its nerves outside the CNS which permeate the rest of the body
How does the Peripheral Nervous System communicate with the Central Nervous System?
it transmits messages via neurons to and from the brain
Systems in the Peripheral Nervous System
The Somantic Nervous System The Autonomic Nervous System (The Autonomic Nervous System's two subsystems) The Sympathetic Nervous System The Parasympathetic Nervous System
What’s the Somantic Nervous System’s main job?
its main job is to transmit and receive messages from sensory receptors in cells of the sense organs and send them to the CNS
Within the Somantic Nervous System, the CNS messages
muscles to act
when the CNS messages muscles to act within the Somantic Nervous System, what Neurotransmitter does it use?
Noradrenaline
The Autonomic Nervous System operates without
conscious awareness due to it being involuntary
The Autonomic Nervous System governs
vital functions
what vital functions does the Autonomic Nervous System govern?
breathing heart rate digestion sexual arousal stress response
what are the Autonomic Nervous System’s subsystems?
The Sympathetic Nervous System
The Parasympathetic Nervous System
what does the Sympathetic Nervous System do?
it increases bodily activity and helps deal with emergencies
what is the Sympathetic Nervous System a key part in?
fight or flight
