1.divisions of the nervous system Flashcards
the human nervous system is a…
complex network of nerve cells that carry messages to and from the brain and spinal cord to different parts of the body
the central nervous system CNS
the brain and spinal chord
the peripheral nervous system
nerve cells that carry information to or from the CNS
divisions of the CNS
spinal chord
brain
divisions of the peripheral nervous system
somatic nervous system
and autonomic nervous system that divides into the sympathetic or parasympathetic nervous system
the brain
involved in many different physiological processes, some in control of vital functioning
outer layer= cerebral cortex for higher thinking e.g problem solving
PNS the somatic nervous system SNS
nerves we actively control
receives info from sensory receptors and sends info to the CNS to control muscle movement
PNS the autonomic nervous system
works automatically= not have to think for the nerves to work
eg heart beat
2 sub divisions: sympathetic and parasympathetic
the spinal chord
receives and transmits information to and from the peripheral nervous system
responsible for reflex actions
differences between somatic and autonomic systems
SNS sensory and motor pathways, ANS= only motor
ANS controls internal organs and glands
SNS skeletal muscles and movement
ANS controls centres in the brain, SNS from the motor cortex
The sympathetic nervous system SNS prepares an individual for…and the parasympathetic nervous system PNS
SNS prepares for action eg fight or flight and the PNS relaxes them when the emergency is over
SNS= heart beat and faster, PNS slows heart
