Action Potentials

lucyslade1
Mind Map by lucyslade1, updated more than 1 year ago
lucyslade1
Created by lucyslade1 over 6 years ago
364
0

Description

AP for ItN module

Resource summary

Action Potentials
  1. Large, brief reversal of potential in axonal plasma membrane
    1. Initiated by stimulus, 3 factors
      1. Depolarisation
        1. Large concentration of Na+ ions cross plasma membrane
          1. Once threshold reached (~-50mV)
            1. Voltage-sensitive Na+ channels open allowing more Na+ to rush into cell
              1. Produces large shift in polarity of neuron
                1. Now an all or nothing response
        2. Repolarisation
          1. Once polarity reaches peak (~30-50mV)
            1. Na+ channels are inactivated
              1. K+ moves out of cell to repolarise it
                1. Repolarise: Return to resting potential
          2. Hyperpolarisation
            1. Voltage of membrane reverses again
              1. Goes slightly below resting potential (~-80mV)
                1. Returns to resting baseline
          Show full summary Hide full summary

          Similar

          History of Psychology
          mia.rigby
          Biological Psychology - Stress
          Gurdev Manchanda
          Psychology A1
          Ellie Hughes
          Psychology subject map
          Jake Pickup
          Bowlby's Theory of Attachment
          Jessica Phillips
          Memory Key words
          Sammy :P
          Psychology | Unit 4 | Addiction - Explanations
          showmestarlight
          The Biological Approach to Psychology
          Gabby Wood
          Chapter 5: Short-term and Working Memory
          krupa8711
          Cognitive Psychology - Capacity and encoding
          T W
          Psychology and the MCAT
          Sarah Egan