| A | B |
|---|
| neuron | sends and receives information |
| dendrites | short extensions from cell body that receive information |
| axons | long extensions from cell body that send information |
| synapse | gap between neurons |
| myelin | fatty substance protects axon |
| CNS | brain and spinal cord |
| PNS | nerves outside of brain and spinal cord |
| meninges | connective tissue that protects CNS |
| pia mater | rich in blood vessels; inner layer |
| arachnoid mater | web-like middle layer |
| dur mater | tough outer layer |
| Cerebrospinal fluid | shock absorber to brain and spinal cord |
| sensory nerves | carry information from outside world up spinal cord to brain to be interpreted |
| motor nerves | carry information from brain and spinal cords to muscles and organs |
| Transient Ischemic Attack | temporary decrease in blood flow to brain cells |
| Stroke | complete blockage of blood flow to the brain killing brain cells |
| aphasia | disorder that interferes in communication |
| Parkinson's disease | lack of neurotransmitter dopamine |
| epilepsy | chronic seizure activity |
| Multiple sclerosis | immune disorder that destroys myelin sheaths |
| coma | unconsciousness lasting 2 - 4 weeks |
| persistent vegetative state | long term lack of ability to respond to the environment |
