neuroscience

posted by .

In a laboratory, scientists often study neurons in isolation, outside of a living
creature, in a dish. In this setting, one can have a good deal of control over the
local ionic environment in which the cell exists, because we can control the
makeup of the solution – the 'medium' – in the dish. This situation is a bit like
replacing the extracellular fluid that the cell would normally be bathed in with
some other fluid.!

There are a variety of different kinds of media that scientists use for different
purposes. Let’s consider a few standard ones, including Dulbecco’s Modified
Eagle’s Medium (DMEM)* and "depolarization" medium.!

The table below lists the ionic concentrations for these media. The "intracellular"
column lists the concentrations inside a particular neuron. All concentrations
below are in mM (millimolar).!
!
ion/ Intracellular/ DMEM /"depolarization medium"
K+ /140 /5.3/ 55
Na+ /10/ 154 /105
Cl- /12 /119/ 119
Ca2+/ 0.0001 /1.8/ 1.8

Based on this chart, what is the Nernst potential for K+ for the cell, bathed in
DMEM at 37C?!

Check the best option!
• 87 mV!
• -87 mV!
• -25 mV!
• 25 mV!
• -60 mV!

  • neuroscience -

    Second Question:

    What is the Nernst potential for Cl- in DMEM at 37C?!
    Check the best option!
    • 80 mV!
    • -80 mV!
    • 61 mV!
    • -61 mV!

    Third question:

    What is the Nernst potential for Na+ in DMEM at 37C?!
    Check the best option!
    • 73 mV!
    • -73 mV!
    • 63 mV!
    • -63 mV!

  • neuroscience -

    -25
    80
    63

  • neuroscience -

    nm

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. General Chem

    The concentration of potassium ions inside a nerve cell is around 20 to 30 times that outside the cell. Calculate the potential difference between inside and outside a nerve cell, if it depends only on this ionic imbalance.
  2. Biology

    1. How can transport be disrupted in a cell?
  3. Functions/Logarithims

    Energy is needed to transport a substance from outside a living cell to inside the cell. This energy is measured in kilo calories per gram molecule, and is given by E = 1.4 log (C1) / (C2 where C1 represents the concentration of the …
  4. biology

    Organisms must be able to adapt to a changing external and internal environment. An organism's ability to maintain a stable internal environment is known as homeostasis. How does a cell's membrane help an organism maintain homeostasis?
  5. Co-op

    I have to writeabout the work setting and work environment of a pharmacy technician... I am allowed to copy and paste from a website as long as you reference it so I did... but all in all this is what I wrote.: Work environment: Pharmacy …
  6. WRITING

    I need help revising for pronouns towards this paragraph: Choosing a roommate is more difficult than they might think. People have different attitudes about sharing a living space. These attitudes are often based on our notions of …
  7. Science

    Why is it important for scientists to be open-minded but skeptical?
  8. Biology

    What type of cell does our brain use to control muscle movement?
  9. science

    Two im not sure on, please check? What is the true work of all scientists?
  10. English

    ________, studies by scientists have found a fly's brain can process information faster than nearly any living creature Which transitional phrase would most appropriately connect the paragraphs?

More Similar Questions