physics

An axon is the relatively
long tail-like part of a neuron, or nerve cell. The outer surface of the axon membrane is charged
positively, and the inner surface is charged negatively. The membrane itself has a dielectric
constant k ~ 5 and a thickness d ~ 10−8 m. Thus the membrane is a kind of capacitor. Assuming
that the membrane acts like a parallel plate capacitor with a plate area of 5 × 10−6 m2, what is
its capacitance?

  1. 0
  2. 0
  3. 19
asked by edd
  1. C = k*A*(epsilono)/d)

    The permittivity constant, "epsilon zero" is
    8.85*10^-12 Farads/meter

    1. 0
    2. 0
    posted by drwls
  2. 5(8.85*10^-12)*(5*10^-6)/(1*10^-8)
    C=2.2125*10^-8C2/Nm

    1. 0
    2. 0
    posted by Leona

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    The speed of propagation of the action potential (an electrical signal) in a nerve cell depends (inversely) on the diameter of the axon (nerve fiber). If the nerve cell connecting the spinal cord to your feet is 0.97 m long, and

    asked by Bec on January 18, 2016
  2. biology/ help please

    which part of a neuron in the cerebellum of the brain is the most extensive in terms of anatomical developement? a-hillock region b-cell body c-dendrites d-nucleus e-axon -my answer is axon

    asked by joy on April 8, 2013
  3. biology/ help please

    which part of a neuron in the cerebellum of the brain is the most extensive in terms of anatomical developement? a-hillock region b-cell body c-dendrites d-nucleus e-axon -my answer is axon

    asked by joy on April 9, 2013
  4. science

    What part of a nerve cell receive the nerve impulse? Dendrite, Synapse or the Axon?

    asked by scicenemaster21212 on February 2, 2015
  5. ap biology

    10 . Which one of the following statements is NOT true about the resting potential? (28.3) [Hint] A. The neuron's plasma membrane is much more permeable to potassium than to sodium. B. The concentration of sodium is much higher

    asked by carol on November 6, 2008
  6. biology

    When an impulse moves down the axon, a. sodium ions first rush out of the cell. b. a small part of the axon momentarily reverses its polarity. c. the resting potential of the cell does not change. d. potassium ions are pumped into

    asked by Lily on November 30, 2010
  7. Science help.

    1. The ___ is the outer, thinnest layer of your skin, which houses sweat pores. (1 point) epidermis dermis fatty layer hair 2. One of the purposes of sweat glands is to release waste products, such as water and _____. (1 point)

    asked by Someone on March 14, 2013
  8. Check + biology

    The following statement describes, in random order, events during the transmission of a nerve impulse. Use them to answer the next \g question(s). Event 1: Positive ions flow into the neuron. Event 2: The resting potential of the

    asked by Anonymous on February 21, 2007
  9. Neuroscience

    A neuron has: 1. a single cell body or soma 2. one or two cell bodies or somata 3. its nucleus in the axon 4. none of the above

    asked by qwerty on November 25, 2014
  10. Bio + check!!

    The following statement describes, in random order, events during the transmission of a nerve impulse. Use them to answer the next \g question(s). Event 1: Positive ions flow into the neuron. Event 2: The resting potential of the

    asked by Anonymous on February 22, 2007

More Similar Questions