IB question: Explain how the nerve impulse passes along a cell [8]- MS

a) resting potential
b) Na+ and K+ come into the cell by active transport
c) concentration gradient builds up, electrochemical gradient
d) negative inside compared to the outside
e) action potential
f) passes the threshold
g) sodium channels open and ions diffuse into neuron
h) membrane is depolarised
i) K+ channels open, and potassium ions diffuse out
j) active transport of Na+ and K+
k Slower in un-mylinated neurons
l) action potential can depolarize neighboring section of membrane causing another action potential to be passed along the membrane.