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Nervous system (the brain (four parts; Cerebrum,cerebellum, brain stem and…

- - - - end bulbs contains synaptic vesicles that contain neurotransmitters.
      - Myelin acts as an insulator
      - Most axons are surrounded by a myelin sheath
- - - - astrocytes- star shaped cells with many processes.help form the blood
      - Oligodendrocyte ; form the myelitis sheath for neurons of CNS.
      - Microglia - small,have fewer processes and are phagocytes
- - - - Nerve impulse is transmitted during action potential. Strong enough stimulation nerve impulses causes Na+ gates to open to Na+ rush into cell causing depolarization.
      - types of conduction's; Continuous conduction and salutatory conduction
      - At least 30-50 different neurotransmitters identified.
- - - - cerebral cortex- dark outer area consists of gray
      - frontal, temporal, parietal,occipital