Nervous System Flashcards
master controlling and communicating system of the body
nervous system
consists of the brain and spinal cord, acts as the integration and command center
CNS
consists mainly of nerves that extend from the brain to the spinal cord, carries impulses
PNS
made up of nerve fibers that convey impulses to the CNS from sensory receptors
sensory/afferent division
carries messages from the CNS to muscles and glands
motor/efferent divison
dispose of debris
microglia
line the brain and spinal cord, circulate fluid
ependymal
wrap around nerve fibers, fatty, make myelin sheaths
oligodendrocytes
create myelin sheaths in the PNS
schwann cells
cushion the PNS
satellite
neurons that process incoming impulses
dendrites
conduct signals away from neurons
axon
connects axon to the cell body
axon hillock
contain neurotransmitters
axon terminal
carry impulses across synapse
neurotransmitters
gap between neurons
synaptic cleft
junction of neurons
synapse
covers nerve fibers
myelin
gaps in schwann cells
nodes of ranvier
nuclei
controls cell
