Summary Problem2

External features
- Cell membrane Semipermeable membrane the enclose the neuron
 Composed of lipid delayer
 Different types of proteins in it (Signal/Channel)
- Dendrites Shor processes going out the cell body
- Axon hillock Cone shaped region between axon and cell body
(integration zone)
- Cell body/Soma Metabolic center of neuron
- Axon Long narrow process from cell body (conduction zone)
- Myelin Fatty isolation around many axons (often for motor
neurons)
 Myelination of CNS by oligodendrocyte (several
myelinsegments, often on several axons)
 Myelination of PNS by schann cells (each
constitutes ONE myelin segment)
- Nodes of Gabs between myelin segments
ranvier
- Button/Axon Ending of axon  release chemicals into synapse
terminal
- Synapses End of Button

Internal features
- Endoplasmatic Folded membranes in cell body
reticulum  Rough portions: Syntheses of proteins
 Smooth portions synthesis of fats (decrease
hormones and poison)
- Cytoplasm Clear internal fluid of cell
- Ribosomes On rough endoplasmatic reticulum
 Synthesis of proteins
- Golgi complex System of folded membrane
 Package of molecules in vesicles
- Nucleus Contains DNA
- Mitochondria Sites of aerobic (oxygen consuming) energy release
Have own DNA
 Build ATP
- Synapic Membrane package that store neurotransmitters
vesicles
- Neurotransmitt Molecules that are released from active neuron
ers

Types of neurons
- Unipolar Sensory neurons
- Multipolar Motorneurons and Pyramid cells
- Bipolar Switching cells

Glia Cells Non-neural brain cells that provide structural,
nutritional and other support for the brain
- Oligodendrocyt Glia cells that are the myelin for some neurons of the