Preview

Neurophysiology of Nerve Impulses

Powerful Essays
Open Document
Open Document
1839 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Neurophysiology of Nerve Impulses
EXERCISE 3: Neurophysiology of Nerve Impulses

|ACTIVITY 1: The Resting Membrane Potential |Answers |
|The nervous system contains two general types of cells: neuroglia cells and |C- Neurons |
|nerves. | |
|cell bodies. | |
|neurons. | |
|nephrons. | |
|The resting membrane potential of the neuron in this lab under the control conditions was _______ |0 |
|mV. | |
|True or False: For most neurons, the concentration of Na+ and K+ ions inside and outside the cell|True |
|are the primary factors that determine the resting membrane potential. | |
|Explain why increasing the extracellular K+ causes the membrane potential to change to a less |Increasing the extracellular K+ causes the membrane potential to|
|negative value.

You May Also Find These Documents Helpful

  • Satisfactory Essays

    Nt1310 Unit 3 Lab Report

    • 405 Words
    • 2 Pages

    5. K+ is more permeable than Na+ in a resting neuron. This is because there are few sodium leakage channels.…

    • 405 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Chsc 2p09 Quiz Two Notes

    • 2768 Words
    • 12 Pages

    6. The membrane has open K+ channels, and changing extracellular K+ concentration results in a change in membrane potential. Changing the extracellular Na+ concentration does not significantly change the membrane potential. What do your results suggest about the number or state (open or closed) of Na+ channels in the resting membrane of a neuron?…

    • 2768 Words
    • 12 Pages
    Good Essays
  • Satisfactory Essays

    Nt1310 Unit 3 Quiz

    • 315 Words
    • 2 Pages

    3. Explain what is happening in regards to sodium and potassium in a neuron at (see figure 7.10)…

    • 315 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    -A change in Na+ did not alter the membrane potential in the resting neuron because there are less leakage sodium channels than leakage potassium channels, and more of the potassium channels are open.…

    • 979 Words
    • 4 Pages
    Good Essays
  • Powerful Essays

    NeuroPhsioEX 3

    • 592 Words
    • 3 Pages

    The small increase in voltage causes a small increase in the height of the action potential peak.…

    • 592 Words
    • 3 Pages
    Powerful Essays
  • Powerful Essays

    Physioex 9.0 Exercise 3

    • 2112 Words
    • 9 Pages

    Which way would Na+ move across the membrane if there wer open Na channels? A. into the cell…

    • 2112 Words
    • 9 Pages
    Powerful Essays
  • Powerful Essays

    Unit 9 Assignment SC121

    • 907 Words
    • 9 Pages

    a. Values of maximal depolarization of membrane potential (mV) at different stimulation voltages, by location.…

    • 907 Words
    • 9 Pages
    Powerful Essays
  • Good Essays

    Neurons are the only living cells that maintain a difference in the concentration of ions across their membranes.…

    • 10962 Words
    • 62 Pages
    Good Essays
  • Powerful Essays

    Which way would Na+ move across the membrane if there were open Na+ channels? Na+ would diffuse into the cell. 75. Why did the free nerve ending respond to several different modalities?…

    • 2586 Words
    • 11 Pages
    Powerful Essays
  • Powerful Essays

    Nu-545 Unit 1

    • 5488 Words
    • 22 Pages

    “(3) Specific enzymes that drive active pumps that promote concentration of certain ions, particularly potassium (K+), within the cell while keeping concentrations of other ions, for example sodium (Na+), below concentrations found in the extracellular environment…” (McCance &Huether, pg. 12).…

    • 5488 Words
    • 22 Pages
    Powerful Essays
  • Good Essays

    Unit nine

    • 1541 Words
    • 6 Pages

    a. Describe how there can be an electrical change on either side of a membrane thereby generating a membrane potential. The membrane potential is due to the presence of an ionic concentration difference and electrical gradient between both sides of the membrane.movement of charged molecules across the cellular membrane leads to the creation of electrical signals.…

    • 1541 Words
    • 6 Pages
    Good Essays
  • Powerful Essays

    Action Lab Simulations

    • 1622 Words
    • 7 Pages

    C. Sodium conductance has a sharp spike (almost vertical line to a steady decline, reaching a top of approximately 0.034), however potassium (which peaks at 0.013) is a gentle rise and decline. Sodium conductance peaks at the same time as the membrane voltage. The potassium conductance begins to increase at about 0mV. The sodium conductance begins to increase at -34mV. Sodium movement is much higher at the beginning. Potassium is gradual from middle to end.…

    • 1622 Words
    • 7 Pages
    Powerful Essays
  • Satisfactory Essays

    Ion channels are regionally located and functionally unique. List all the areas on the neuron and the type of potential dependent on the following types of ion channels:…

    • 317 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    5. Threshold for the action potential in the SA node is at ___-40_ mV. What channels open,…

    • 1283 Words
    • 6 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Phys Ex

    • 330 Words
    • 2 Pages

    6. At the threshold stimulus, do sodium ions start to move into or out of the cell to bring about the…

    • 330 Words
    • 2 Pages
    Satisfactory Essays

Related Topics