2.NeuronsB. Structure features of cell bodyShape--spherical,pyramidalfusiformorirregularinshape(5um-150um)membrane-membraneproteins-ionchannelsandreceptor--unitmembrane-irritability,receivestimuliinitiateandconductnerveimpulseNucleus(LM)--Large, spherical--lnthe centerof cell body--Pale-staining--Prominentnucleolus
B. Structure features of cell body membrane Nucleus(LM) -Large, spherical -In the center of cell body -Pale-staining -Prominent nucleolus Shape -unit membrane-irritability, receive stimuli, initiate and conduct nerve impulse -membrane proteins-ion channels and receptor -spherical, pyramidal ,fusiform or irregular in shape(5um-150um) 2. Neurons
Purkinje cellNeuronofPyramidalcell(cerebralcortex)(cerebellum)opticalareaCentral neuronoftheautonomicnervoussystemHypophysealsecretingneuronSpinal cordGanglionicneuronmotorneuronoftheautonomicnervoussystemBipolarPseudounipolarneuronsneuronDiagramsofseveraltypesofneuronsBACK
Diagrams of several types of neurons
2.NeuronsB. Structure features of cell bodyCytoplasm(perikaryon)a.Nissbody(chromophil substance)LM: basophilic spot-liked or granulelikedstructureEM:parallelly-arrangedroughendoplasmicreticulumandfreeribosomefunction:synthesisofproteinsstructuralproteinEnzymes(relatedtothe productionofneurotransmitters)
a. Nissl body(chromophil substance) LM: basophilic spot-liked or granuleliked structure EM: parallelly-arranged rough endoplasmic reticulum and free ribosome function: synthesis of proteins structural protein Enzymes(related to the production of neurotransmitters) Cytoplasm(perikaryon) 2. Neurons B. Structure features of cell body
2.NeuronsB. Structure features of cell bodyCytoplasm(perikaryon)b.NeurofibrilLM:bysilverimpregnationmethods,there are manythread-liked dark brownstructuretoforma network
LM: by silver impregnation methods, there are many t h r e a d -l i k e d d a r k b r o w n structure to form a network. b. Neurofibril Cytoplasm(perikaryon) 2. Neurons B. Structure features of cell body
MtNeurofilamentEM:*neurofilament:10nmindiameter*microtubule: 25 nm in diameterfunction:supporttheneurons asacell skeletoninvolvedinintracellulartransportation
EM: neurofilament: 10 nm in diameter microtubule: 25 nm in diameter function: support the neurons as a cell skeleton involved in intracellular transportation