神經(jīng)元和神經(jīng)膠質(zhì)細(xì)胞-神經(jīng)元-資料下載頁
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【正文】 ransport ? Classified by transport rates : – slow transport system ( to 1 mm/day) – fast transport system (200 to 400 mm/day) Axonal Transport Systems Hitching a Ride on “Retrorail” Membranes of anelles involved in synaptic transmission are returned to the cell body for reuse or degradation Nucleus Cytoskeleton (Anterograde transport)) Component Rate (mm/day) Structure and position Fast transport Anterograde 200400 Small vesiculotubular structures, neurotransmitters。 membrane proteins and lipids Mitochondria 50100 Mitochondria Retrograde 200300 Lysosomal vesicles and enzymes Slow transport SCb 28 Microfilaments, metabolic enzymes, clathrin plex SCa Neurofilaments and microtubules Major Rate Components of Axonal Transport 1. Neurons have specialized projections called dendrites and axons. Dendrites take information to the cell body and axons take information away from the cell body 2. Neurons municate with each other through an electrochemical process 3. Neurons contain some specialized structures (like synapses) and chemicals (like neurotransmitters) 4. Nissl Bodies 5. DO NOT Replicate: Damaged cells cannot be replaced! Neurons differ from Other Cells
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