Preview

Lab Report- Neurophysiology of Nerve Impulses

Better Essays
Open Document
Open Document
1755 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Lab Report- Neurophysiology of Nerve Impulses
Introduction Neurons (also known as neurons, nerve cells and nerve fibers) are electrically excitable and the most important cells in the nervous system that functions to process and transmit information. Neurons have a large number of extensions called dendrites. They often look likes branches or spikes extending out from the cell body. It is primarily the surfaces of the dendrites that receive chemical messages from other neurons.
One extension is different from all the others, and is called the axon. Although in some neurons, it is hard to distinguish from the dendrites, in others it is easily distinguished by its length. The purpose of the axon is to transmit an electro-chemical signal to other neurons, sometimes over a considerable distance.
Longer axons are usually covered with a myelin sheath, a series of fatty cells which have wrapped around an axon many times. They serve a similar function as the insulation around electrical wire.
At the very end of the axon is the axon ending. It is there that the electro-chemical signal that has travelled the length of the axon is converted into a chemical message that travels to the next neuron. (Dr. C. George Boeree, 2009).
Axons are what make up nerves. A nerve is a bundle of neurons fibers or processes wrapped in connective tissue that extends to and/or from the CNS and visceral organs or structures of the body periphery (Marieb & Mitchell, 2009). In this experiment we will work with a nerve The action potential we will see on this experiment reflects the cumulative action potentials of all the neurons in the nerve, called a compound nerve action potential. Although an action potential follows the all-or none law within a single neuron, it does not necessarily follows the all-or-none law within an entire nerve. When you electrically stimulate a nerve at a given voltage, the stimulus may result in depolarization of most of the neurons but not necessarily all of them. To achieve depolarization of all of



References: Marieb, E. N, & Mitchell, S. J. (2009). Human Anatomy & Physiology laboratory manual. (9th ed., pp. 125-131). San Francisco, CA: Pearson Education , Inc. Martini, F. H., Nath, J. L., & Bartholomew, E. F. (2012). Anatomy & Physiology. ( 9th ed., pp. 386-400). San Francisco, CA: Pearson Education, Inc. Curare. Retrieve from http//www.blueplanetbiomes.org/curare.htm Lidocaine. Retrieved from http://www.drugs.com/pro/lidocaine.html

You May Also Find These Documents Helpful

  • Satisfactory Essays

    work file 5 3

    • 611 Words
    • 2 Pages

    There are five major parts of a neuron, the axon, soma, dendrites, the axon hillock and the terminal buttons. The axon transmits the neural signal. The stoma is where signals from the dendrites are joined and passed on. It serves to maintain the cell and keep the neuron functional. The dendrites help increase the surface area of the cell body. They receive info from other neurons and transmit electrical stimulation to the stoma. The axon hillock controls the firing of the neuron. The terminal buttons are responsible for sending the signal on to other neurons.…

    • 611 Words
    • 2 Pages
    Satisfactory Essays
  • Powerful Essays

    Brain functioning table

    • 996 Words
    • 5 Pages

    Myelin sheath is an insulating envelope of myelin that surrounds the core of a nerve fiber or axon and that facilitates the transmission of nerve impulses, formed from the cell membrane of the Schwann cell in the peripheral nervous system and from oligodendroglia cells.…

    • 996 Words
    • 5 Pages
    Powerful Essays
  • Powerful Essays

    Anatomy Case paper

    • 2241 Words
    • 9 Pages

    Marieb, R.N., Ph.D, E. N., & Mitchell, Ph.D., S. J. (2012). Human Anatomy & Physiology Laboratory Manual (10th Update ed.). Glenview, IL, USA: Pearson Education Inc., Publishing as Benjamin Cummings.…

    • 2241 Words
    • 9 Pages
    Powerful Essays
  • Good Essays

    Brain Functioning Table

    • 581 Words
    • 3 Pages

    Myelin sheath is an insulating envelope of myelin that surrounds the core of a nerve fiber or axon and that facilitates the transmission of nerve impulses, formed from the cell membrane of the Schwann cell in the peripheral nervous system and from oligodendroglia cells.…

    • 581 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    Axons from one neuron can synapse with the axon terminal of another neuron. These synapses are called…

    • 1270 Words
    • 6 Pages
    Satisfactory Essays
  • Better Essays

    Diabetes Insipidus

    • 727 Words
    • 3 Pages

    Tortora, Gerard J., and Bryan Derrickson. Principles of Anatomy and Physiology. Hoboken, NJ: John Wiley, 2009. Print.…

    • 727 Words
    • 3 Pages
    Better Essays
  • Better Essays

    Tiny bulblike structures at the end of the axon, which contain neurotransmitters that carry the neuron's message into the synapse.…

    • 889 Words
    • 4 Pages
    Better Essays
  • Good Essays

    Dendrites receive incoming signals for the nerve cell. Axons are the branches from the cell body that…

    • 896 Words
    • 4 Pages
    Good Essays
  • Powerful Essays

    Amber's Secret

    • 2269 Words
    • 10 Pages

    References: 1. Marieb, R.N., Ph.D, E. N., & Hoehn, M.D., Ph.D., K. (2013). Human Anatomy & Physiology (ninth ed., pp. 1035-1089). Glenview, IL: Pearson Education Inc.…

    • 2269 Words
    • 10 Pages
    Powerful Essays
  • Better Essays

    Tortora, G.J, Derrickson, B. H. (2009) Principles of Anatomy and Physiology. 12th ed. Hoboken: John Wiley and Sons, Inc.…

    • 1636 Words
    • 7 Pages
    Better Essays
  • Good Essays

    * The axon is a long, thin fiber that transmits signals away from the soma to other neurons or to muscles or glands.…

    • 1139 Words
    • 5 Pages
    Good Essays
  • Good Essays

    13) Dendrites are a cluster of fibers that look like twisted branches of a tree and they receive messages from other neurons.…

    • 809 Words
    • 4 Pages
    Good Essays
  • Powerful Essays

    Hashimoto's Thyroid Disease

    • 2571 Words
    • 10 Pages

    Have you been living your life trying to be as healthy as you could possibly be? What if one day you had a visit with your doctor and found out that something is wrong? Well, this is exactly what happened to my mother and her sisters, which made me wonder if it could happen to me. I am referring to a condition called Hashimoto 's Thyroid Disease, which is a common hypothyroid disorder found among many different people and countries throughout the world. As you read through this paper, you will learn the basics about Hashimoto 's Thyroid Disease, including some of the causes, the signs and symptoms, and the treatment.…

    • 2571 Words
    • 10 Pages
    Powerful Essays
  • Satisfactory Essays

    This is a model answer for a 6 mark question in a Science GCSE exam. You differentiate between the two neurones if you like, and then describe the structures of the neurones and explain what each part of the neurone does, e.g what the myelin sheath does and so on.…

    • 259 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Why Are Neurons Important

    • 528 Words
    • 3 Pages

    Neurons are the essential tools we use for every sense that we have, from touch and sound, to critical thinking processes. While true that some neurons vary in many different kinds of shapes, most contain the same basic structure. A neuron consists of three parts: a cell body, dendrites, and an axon. The cell body contains the nucleus and the dendrites receive input from other neurons through the use of their widely branching structures. Dendrite comes from a Greek word meaning "tree". The axon transmits information to other cells. Differing from the dendrites, the axon is a long, thin fiber with branches at its tip.…

    • 528 Words
    • 3 Pages
    Good Essays

Related Topics