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* Biol 243 Nervous Tissue (Ch-11) 1+2-1

* Biol 243 Nervous Tissue (Ch-11) 1+2-1 - I C'l‘a'SSIeryd...

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Unformatted text preview: I C'l‘a'SSIeryd by Structure? ,. Type Structural characteristics Location ' ® Bipolar neuron (D Cell body with a nerve fiber arising 5 a) in specialized parts of the eyes, nose. and from each end ears @ Unipotar neuron @Celi body with a single nerve fiber u @ In ganglia outside the brain or spinal cord that divides into two branches (3) Multipolar neuron @ Cell body with many nerve fibers. M® Most common type of neuron in the brain one of which is an axon and spinal cord . classified by Function" Type , ' Functional characteristics Structural characteristics (1,. Sensory neuron CD Conducts nerve impulses from S a Most unipolar; some bipolar receptors in peripheral body parts into the brain or spinal cord . > .i‘. i . @. lnterneuron ; A J‘ @ Transmits nerve impulses between I @ Multipolar neurons within the brain and spinal cord (3: Motor neuron E; Conducts nerve impulses from M (3/ Multipolar the brain or spinal cord out to effectors—muscles or glands [email protected] “fl“ - » NE UROGLIA dfi . . .‘ . ype and Microscopic Appearance DesrrIplIon and Lemma FuntlIons @ Astrocytes Star—shaped cells with manx processes-fl Pro- ‘ Partici ate in the metabolism of neurotransmit— top asmic gsgpgéges are foun In the gray tersand maintam t e proper alance of K*Tor Astrocyte / Process of matter 0 t e CNS and fibrous astrocgtes generation O nere 1m u ses neurons; ,_ :5” astrocyte are ound In the white matter of the CNS. ’ par te In Brain development By assmtlng ~ 4 113-3- mmmqfflgurons help form the bloodmbrain ' banier that regulates the passage of substances _ into the bIain (see page 4| 1); twine around neu— C +6 S runs to form a supportmg network; prowde a' R9£ f0 \{ linl< between neurons and blood vessels. Blood vessel ® Oligodendrocytes Most common glial QUEEQES; smalleI Give support to neurons in CNS; produce Injelin than astlocytes with fewer EIoEtissEs (hence sheath-around axons of neurons of CNS; each the name); round or oval cell body. “lIgodendrocyte wraps rfiyénn around several axons. 0 [£30 Jericho CY"? 5 ...
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