Resting Membrane Potential

Mind Map by lucyslade1, updated more than 1 year ago
Created by lucyslade1 over 6 years ago


RMP in ItN module

Resource summary

Resting Membrane Potential
  1. Specific distribution of ions at rest make the inside of the neuron negative relative to the outside
    1. Electrical potential: measure of stored power, or potential energy
      1. Created by a difference in charge across a membrane
        1. Created by an unequal distribution of ions
      2. Actively maintained by channels, gates & pumps in plasma membrane to counter effects of diffusion and voltage gradients
        1. Large, negatively charged A- anions remains inside cell
          1. Ungated K+ channels allow K+ to move freely across membrane
            1. K+ is kept out
              1. Na+/K+ pumps bring K+ into cell from extracellular fluid
                1. The pumps pass Na+ out of cell from intracellular fluid
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