nervous system Flashcards
teas
two parts of of the nervous system
the central and the peripheral nervous
central composed of
brain and spinal cord
what is the central nervous system
centeral commmand center where all communication and actions occur in the body
the peripheral is composed of
nerves that branch off from the spinal cord and innervate the body this system by the brain to targeted locations
nervous syttems is resposible for
for sending signals from the brain to the body
sturcture of the neuron
cell body, dendrite, axon
cell body
contains the nucleus and organelles
dendrite
short, branch link extesions that generate electrical impulses
axon
long extension that transmits signals to other neuron
end of axom
kind of termial buttons which release neurotransmitters called axon terminal
myelin sheath
white substance that covers the axon and helps increase the speed of the nerve impulses
synapse
is the space between the terminal buttons of one neuron and the dendrites of another neuron
function of neuron
sensory(afferent), motor(efferent)
sensory neurons
send messages to the central nervous system
motor
send messages to our musels
motor autonomic
autonomic involuntary such as heart rate
motor somatic
motor somatic voluntary like moving your limbs