make a presentation on nervous system

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Biology

make a presentation on nervous system

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The Nervous SystemThe nervous system is a network of neuronswhose main feature is to generate modulate and transmitinformation between all the different parts of the human body Thisproperty enables many important functions of thenervous system such as regulation of vital body functionsheartbeat breathing digestion sensation and body movementsUltimately the nervous system structures preside over everythingthat makes us human our consciousness cognition behaviour andmemoriesThe nervous system consists of two divisions Central nervous system CNS is theintegration and command center of the bodyPeripheral nervous system PNS represents theconduit between the CNS and the body It is further subdivided intothe somatic nervous system SNS and the autonomic nervous systemANSCells of the nervous systemTwo basic types of cells are present in the nervous systemNeuronsGlial cellsNeurons or nerve cell are the main structural and functionalunits of the nervous system Every neuron consists of a body somaand a number of processes neurites The nerve cell body containsthe cellular organelles and is where neural impulses actionpotentials are generated The processes stem from the body theyconnect neurons with each other and with other body cells enablingthe flow of neural impulses There are two types of neuralprocesses that differ in structure and functionAxons are long and conduct impulses away fromthe neuronal bodyDendrites are short and act to receiveimpulses from other neurons conducting the electrical signaltowards the nerve cell bodyEvery neuron has a single axon while the number of dendritesvaries Based on that number there are four structuraltypes of neurons multipolar bipolarpseudounipolar and unipolarTypes of NeuronsHow do neurons functionThe morphology of neurons makes them highly specialized to workwith neural impulses they generate receive and send theseimpulses onto other neurons and nonneural tissuesSynapseThere are two types of neurons named according to whether theysend an electrical signal towards or away from the CNSEfferent neurons motor or descending sendneural impulses from the CNS to the peripheral tissues instructingthem how to functionAfferent neurons sensory or ascendingconduct impulses from the peripheral tissues to the CNS Theseimpulses contain sensory information describing the tissuesenvironmentThe site where an axon connects to another cell to pass theneural impulse is called a synapse The synapsedoesnt connect to the next cell directly Instead the impulsetriggers the release of chemicals calledneurotransmitters from the very end of an axonThese neurotransmitters bind to the effector cells membranecausing biochemical events to occur within that cell according tothe orders See Answer

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make a presentation on nervous system

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