Neuroglia
cells that support and protect neurons
Neurons
nerve cells that transmit impulses
Cell Body
contains the nucleus
Axons
conduct impulses away from the cell
Dendrites
conduct impulses toward the cell
Myelin Sheath
fatty material that protects nerve fibers
Sensory Neurons
carry impulses from sensory receptors to central nervous system
Motor Neurons
carry impulses from central nervous system to muscles and glands
Association Neurons
connect motor and sensory neurons
Cranial Nerves
come from brain
Spinal Nerves
come from spinal cord
Meninges
3 connective tissue membranes cover brain
Central Nervous System
made up of the brain and spinal cord
Peripheral Nervous System
nerves that extend from brain and spinal cord
Sensory Division
from sensory receptors to central nervous system
Motor Division
from central nervous system to muscles/glands
Somatic
voluntary (ex: skeletal muscles)
Autonomic
involuntary (ex: cardiac, smooth muscle, glands)
Sympathetic
fight or flight
Parasympathetic
resting and digesting