神經(jīng)元和神經(jīng)膠質(zhì)細(xì)胞-神經(jīng)元-文庫吧
2024-11-23 11:26 本頁面
【正文】 re inside of a neuron? Nucleus Nucleolus Microfilaments/Neurotubules Endoplasmic Reticulum (ER) Mitochondria Golgi Apparatus Nissl Bodies Others ? Dendrites : – dendrite tree ? Axon : – axon hillock (axon origination) – axonal transport system – initial segment (first myelin sheath) ? action potential generation – myelin sheath Axon and Dendrites Axons Dendrites Take information away from the cell body Take information to the cell body Smooth surface Rough surface (dendritic spines) Generally only 1 axon per cell Usually many dendrites per cell No ribosome Have ribosomes Can have myelin No myelin insulation Branch further from the cell body Branch near the cell body Differences between Axons and Dendrites Neuron Classification by Shape ?Multipolar: “multi” many processes –Majority: Single axon, many dendrites (motor neuron and interneuron) ?Bipolar: “bi” 2 processes –Found in some sensory ans (retina, taste, smell, inner ear neuron) ?Unipolar (pseudounipolar): “uni ” 1 process (with branches) –Sensory afferent neurons (dorsal root ganglia) Classification of Neurons by Morphology Classification of Neurons by Axon Length 1. Golgi type I Neurons ?
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