Short Essay On Nervous System

When the electric impulse arrives, the presynaptic membrane of the axon releases neurotransmitters that bind to the postsynaptic receptors of the dendrites of the next cell.The activated state of these receptors alters the permeability of the dendritic membrane and the electric depolarization moves along the plasma membrane of the neuron to its axon.

Tags: How To Write Essays FastWhat Is A Citation In Writing EssayGood Ways To Start An Ap EssayWrite A Comparison EssayWatergate Scandal EssayWho Won The War Of 1812 EssaySeminary DissertationInternet Research PaperBlackberry Picking Seamus Heaney Analysis EssayLiterature Review On The Use Of Ict In Education

The function of the myelin sheath is to improve the safety and speed of neural impulse transmission along the axon.

The myelin sheath serves as an electrical insulator, preventing the dispersion of the impulse into other adjacent structures. In the central nervous system (CNS), the myelin sheath is made of an apposition of oligodendrocyte membranes.

The axon is the long membrane projection that transmits the neural impulse at a distance to other neurons, to muscle cells and to other effector cells.

Synapses are the structures that transmit a neural impulse between two neurons.

Neurotransmitters trigger the receptors on the next nerve cell dendrites to produce a new electrical current.

Different types of nerves use different neurotransmitters to convey impulses across the synapses.Afference is the conduction of sensory impulses and efference is the conduction of effector impulses (impulses that command some action in the body). Nerves are axon-containing structures which are home to a large number of axons and which are covered by connective tissue.Nerves connect neural nuclei and ganglia with tissues.Glial cells and neurons are the cells that form the nervous system.Neurons are cells that have the function of receiving and transmitting neural impulses whereas glial cells (astrocytes, microgliacytes, ependymal cells and oligodendrocytes) are the cells that support, feed and insulate (electrically) the neurons.Dendrites are projections of the plasma membrane that receive the neural impulse from other neurons.The cell body is where the nucleus and the main cellular organelles are located.The structures that form the nervous system can be divided into the central nervous system (CNS) and the peripheral nervous system (PNS).The organs of the CNS are the brain (cerebrum, brainstem and cerebellum) and spinal cord. In addition to these organs, the meninges (dura-mater, arachnoid and pia-mater) are also a part of the nervous system, since they cover and protect the encephalon and the spinal cord.Examples of neural ganglia are the ganglia that contain the cell bodies of sensory neurons in the dorsal roots of the spinal cord and the ganglia of the myenteric plexus, which are responsible for the peristaltic movements of the digestive tract.In the central nervous system (CNS), concentrations of neuron bodies are called nuclei and not ganglia.


Comments Short Essay On Nervous System

  • Nervous system free essay sample - New York Essays

    Nervous system - essay example for free Newyorkessays - database with more than 65000 college essays for studying 】…

  • Overview of the Nervous System - Brain, Spinal Cord, and.

    The nervous system is an extraordinarily complex communication system that can send and receive voluminous amounts of information simultaneously. However, the system is vulnerable to diseases and injuries, as in the following examples Nerve cells can degenerate.…

  • Nervous system - Better Health Channel

    The nervous system uses electrical and chemical means to help all parts of the body to communicate with each other. The brain and spinal cord make up the central nervous system. Nerves everywhere else in the body are part of the peripheral nervous system. The nervous system helps all the parts of…

  • Essay Endocrine & Nervous System Comparison

    Essay Endocrine & Nervous System Comparison…

  • Compare and contrast the two divisions of the Autonomic.

    Compare and contrast the two divisions of the Autonomic Nervous System; the sympathetic and parasympathetic divisions. - Answered by a verified Writer…

  • Autonomic Nervous System Essay Examples Kibin

    Stuck on your essay? Browse essays about Autonomic Nervous System and find inspiration. Learn by example and become a better writer with Kibin’s suite of essay help services.…

  • Central nervous system essay conclusion – White Rice.

    Central nervous system research paper. Research papers. Behavior then he can be sure to find answers in organizations. Ap language rhetorical analysis essay writer or academic help create a central nervous system or cns infection are the _____.…

  • The Nervous System - Biology Questions

    The Nervous System Review - Image Diversity oligodendrocytes Schwann cells; 15. What are some diseases in which the axonal myelin sheath is progressively destroyed? Multiple sclerosis is a severe disease caused by progressive destruction of the myelin sheath of the central nervous system. Guillain-Barré disease is due to the destruction of the myelin sheath in the peripheral nervous system.…

  • Nervous System Essays Examples, Topics, Titles, & Outlines

    View and download nervous system essays examples. Also discover topics, titles, outlines, thesis statements, and conclusions for your nervous system essay.…

  • Essay on Central Nervous System - 1898 Words Cram

    Essay The Nervous System And Central System. The Nervous System The nervous system is one of the most important systems in the human body because it sends out messages from the brain into the body parts and coordinates the body activities.…

The Latest from ©