B. Career pathway I think if not then I apologize:) and
The nurse would smile in improvement but would still be a bit annoyed because smoking at all will affect her
Answer: The correct answer is (D) Both A and B
Explanation:
When an axon is depolarized at halfway to the threshold level,the action potential will be generated that would travel 'downstream' i.e towards the synapse and 'upstream' i.e back towards the cell body. This is because both channels on either sides are not under refractory period,i.e they are open.
