repolarisation and the refractory period

• what happens to the membrane after depolarisation


  the membrane is repolarised
• what happens to the voltage gated channels during repolarisation


  the sodium ion closes and the potassium gates open
• what happens during repolarisation


  the k+ ions diffuse out of the axon reducing the potential difference across the membrane
• where on the nerve transmission graph is repolarisation


  after the peak
• what happens to the concentration of the ions during the refactory period


  the concentrations are restored to that of the resting potential
• what happens during the refractory period that ensures that the transmission is one direction only


  the axon cannot transmit another action potential
• for how long in the refractor period can action potential not be trasnmitted


  1 millisecond