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The nervous system (Organistaion of the nervous system (pathways (sensory,…
The nervous system
Organistaion of the nervous system
anatomic division
central nervous system
brain
spinal cord
peripheral nervous system
all the neurons outside of the two organs in the cns
functional divisions
autonomic nervous system
involuntary regulation
parasympathtic and sympathetic
somatic nervous system
conscious control
involuntary or voluntary
pathways
sensory
from sensory organs to central nervous system
motor
from central nervous system to effectors
combined
sensory and motor functions
Neurons
nerve impulses
very unique appearance
3 types of neurons
interneurons
central nervous system
connect sensory and motor neurons
sensory neurons
carry messages from receptors to central nervous system
motor neurons
carry messages form central nervous system to effectors
What is a nerve impulse
electrical impulse
body's way of communication
from receptors to effectors
Synaptic transmision
signal passes across synapse
neurotransmitters
The central nervous system
brain and spinla cords with protective layers
soft interior meninges
dura mater
arachnoid mater
pia mater
hard -bone
cranium encases brain
vertebral columns encases spinal cord
cerebrospinal fluid
grey matter
cell bodies and dendrites of neurons
centres of neurological messages
white matter
neurons axons
communications cables