connections between the sensory receptors and the brain

brain and muscles or glands

carries information from periphery to brain

-somatic-carries sensory info from skeletal muscles, joints, and skin

-visceral-carries sensory info from internal organs, smooth muscle, cardiac muscle

carries motor output from CNS to muscles and glands

1. somatic NS goes to muscles and glands

2.autonomic NS regulates smooth muscle cardiac muscle and glands 

largest and most common glial cells in the CNS

-maintain blood barrier

-create 3D framework

-perform repairs on dmaged neural tissue

-guide neuron development

-control concentration of interstitial fluid

smaller asterocytes

forms myelin coating on axons

line spaces within brain and spinal cord

help circulate cerebral spinal fluid

where the nucleus, mitochondria, and many other organelles are located

short projections from the cell body that recieve connections from other neurons

long projections that conduct signals to other cells

end in presynaptic terminals

chemical synapse

junction has 3 parts

presynaptic membrane

synaptic cleft

post synaptic membrane

-electrical impulse causes chemicals to be released from presynaptic membrane.  they diffuse across the cleft and bind receptor proteins there to activate or inhibit the next cells electrical activity