RESTING POTENTIAL

• WHAT IS THE RESTING POTENTIAL VALUE OF A NEURONE?

  -65 mV
• WHAT IS THE AXON DESCRIBED AS AT RESTING POTENTIAL?

  polarised
• PROCESS OF RESTING POTENTIAL?

  1. Sodium ions actively transported out of axon by sodium-potassium pumps
  2. Potassium ions actively transported into axon by sodium-potassium pumps
  3. Three sodium ions move out for every two potassium ions in
  4. More sodium ions in tissue fluid outside the axon than potassium ions in the cytoplasm inside the axon
  5. Creates electrochemical gradient
  6. Axon membrane is impermeable to sodium ions and permeable to potassium ions
  7. Potassium ions diffuse out the axon down concentration gradient