Nervous System Cells 2 types of cells make of neural tissue

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Nervous System Cells 

 2 types of cells ...Neurons (functional unit of neural tissu ...Conducting cells (conducts the action po ...Structures of a neuronContains many short processes called den ...Contain cell body (called the soma) whic ...These are both the receiving end of an a ...Contains single, long process called an  ...This is the transmitting end of an actio ...Types of neuronsMultipolar - example is a motor neuronUnipolar - example is a sensory neuronOther include bipolar, interneurons, etc ...NeurogliaThese were originally described as suppo ...Seperate and protect neuronsSome act as phagocytesHelp regulate composition of interstitia ...Create and maintain the blood brain barr ...Found in CNS and PNSCNSMost variedOligodendrogliaMyelinate CNS axonsMyelin is an insulating sheath around ax ...Myelin is mostly phospolipids - gives wh ...White matter - myelinated axons in the C ...Tracts have names, usually named accordi ...Ex) Corticospinal tract - from motor cor ...Ex) Reticulospinal tract - from a struct ...Neurons are referred to as upper motor n ...Somatic pathways consist of atleast two  ...This is contrasted with Gray matter - mo ...Cell bodies (and therefore Gray Matter)  ...Ex) Basal Nuclei (Ganglia) - communicate ...Nucleus in the cerebrum responsible for  ...These nuclei do not initiate movements,  ...Information arrives in the basal nuclei  ...Signals are sent out which help control  ...Usually, tracts leaving the basal nuclei ...If the substantia nigra is damaged or re ...One group synapes with the thalamus, cre ...One group synapes with reticular formati ...Provide structural supportAstrogliaMaintain BBBCertain compounds dissolved in plasma (h ...Other things can diffuse across (oxygen, ...BBB isolates CNS from aspects of general ...MicrogliaPhagocytes - remove cell debris, wastes  ...PNSSchwann cellsMyelination of peripheral axonsParticipate in repair after injuryOther notes about myelinationRate of nerve impulse is proportional to ...Myelination speeds rate further (more my ...The fastest impulse is about 100m/secSlowest is about 1.5 m/sec
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Nervous System Cells

2 types of cells make of neural tissue

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Neuroglia
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Found in CNS and PNS
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CNS
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Oligodendroglia
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Myelinate CNS axons
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Myelin is mostly phospolipids - gives white appearance