Page 3 of 15 - About 141 Essays
  • Anatomy And Physiology: The Human Nervous System

    in the matured CNS involves a secretion of special chemical molecules called neurotransmitters. Neuroglia provide a variety of functions for brain tissue and support the metabolic and signaling functions of the neurons. Certain types of neuroglia, myelin, serve as an insulation around axons. 4. Neuroglia function depends on the specific type of neuroglia, but they are not sensitive the stimuli and do not generate or conduct nerve impulses. A. Astrocytes: is a star shaped cell that has many…

    Words: 926 - Pages: 4
  • Human Connectome Project: Neuroscientist

    A human’s cognitive ability is unlike any other animal on the earth. Compared to other animals, the human brain possesses more neurons and synapses, tallying eighty-six billion and one hundred fifty trillion respectively. The wiring of the brain and its connections are responsible for human’s superior cognition. Thus, the reason neuroscientists pursue research of neural connections is obvious; neural connections are the fundamental basis of individual expression. Many famous neuroscientists,…

    Words: 928 - Pages: 4
  • Peripheral Nervous System

    two parts, the brain, and the spinal cord. The peripheral nervous system is made up of two parts as well, the somatic nervous system and the autonomic nervous system. 2. What are Neurons? Describe the key parts of Neurons, including: Dendrites, Myelin, Axons, and Synapse. To keep it simple, a neuron is a nerve cell. Most neurons are very similar to a typical cell, but have a few structures that set it apart. The main part of the cell is known as the soma, or cell body. In the soma is the…

    Words: 1077 - Pages: 5
  • The Nervous System: Why Do We Respond And React

    (Pastorino and Doyle-Portillio, 2015). The axon carries the neural impulse away from the cell body. Several structures to note that are present on the axon include the myelin sheath and the nodes of Ranvier. The myelin sheath helps with the insulation of the neural impulse and the nodes of Ranvier are the spaces that are uncovered by the myelin sheath. Once the neural impulse reaches the end of the axon, the neural impulse is now at the terminal button, also known as the axon bulb. The axon bulb…

    Words: 799 - Pages: 4
  • Central Nervous System: A Neurosis Case Study

    known as the myelin sheath, created by oligodendrocytes. This consists of twenty percent protein and eighty percent lipid. Each oligodendrocyte creates enough myelin to wrap around several axons. The periodic gaps between the neurons are known as nodes of Ranvier, where the nerve signals jump from node to node in a process known as salutatory conduction. Nodes of Ranvier have ion channels, which allow them to exchange ions and generate action potential. The purpose of the myelin sheath is…

    Words: 2875 - Pages: 12
  • Neuron Research Paper

    neuron is composed of several parts in its structure and to ensure interneuron communication, it uses neurotransmitters which have a tremendous effect on our mood and behavior. The neuron is composed of 5 main parts, the cell body, dendrite, the axon, myelin sheath, terminal buttons, all are composed together to form the…

    Words: 792 - Pages: 4
  • Neurular Tissue Analysis

    extra layer called a myelin sheath (myelinated). The myelin sheath is an insulator that helps increase the velocity at which an action potential is propagated along an axon. The myelin sheath is commonly made of a type of glial cell known as the Schwann cell. The Schwann cells have small gaps between them termed nodes of Ranvier. Kendal and colleagues state that the action potential moves faster along the internode (myelin sheath) because of the low capacitance of the myelin sheath. Its speed…

    Words: 1279 - Pages: 6
  • Canavan Disease Research Paper

    element known as N-acetyl-aspartate (NAA). When NAA is not broken down properly, it causes a decline of the white substance (myelin) in the brain. Myelin is the fatty layer that acts as padding around the brain nerve fibers and provides nutrition for the nerve cells. When the body stops producing the ASPA enzyme, there is a buildup of NAA that terminates the presence of myelin and damages the brain cells. The indicators of the Canavan Disease typically appear in the first 3 to 9 months of life…

    Words: 619 - Pages: 3
  • Multiple Sclerosis Research Paper

    Though not much is known of the cause of MS, researchers believe that Multiple Sclerosis causes the body’s immune system to attack the myelin sheath. The myelin sheaths are an insulating coating around the nerve cells, consisting of a mixture of proteins and phospholipids, which help to increase the speed at which nerve impulses are conducted. As the myelin degrades the communication between the nerve cells in the central nervous system become muddled causing some parts of the body not to…

    Words: 1308 - Pages: 6
  • Multiple Sclerosis Papers

    Multiple Sclerosis Multiple Sclerosis (MS) is one the deadliest diseases that effects the brain, spine and the central nervous system (CNS). MS is a progressive immune-mediated disease that has an onset stage between ages 20-40 which is affecting 2.5 million people globally (Burke, Hooper, Barlow & Hatter (2013). The onset of multiple sclerosis attacks the immune system which slows down the communication of the brain to the other parts of the body. The immune system begins to breakdown leading…

    Words: 1115 - Pages: 5
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