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Thank you, Mike. You are right. I read further last night and found that. So, although the cell messages are chemical, are the nerve stimulants starting them on their process? What I mean is this:
Guy Murchie says, about the nerve impulse: "Like lightning, the impulse in effect generates itself forming a transient wave of electrical excitation that advances the length of a nerve fiber .... that contains a low-resistance core of potassium ions ..... surrounded by sodium ions....The insulating membrane allows current to leak between the negatively-charged potassium ions (within) and the positively-charged sodium ions (without) ..... a moving wave that conveys its messages."
What I keep thinking is that something has to stimulant chemicals to start moving along. Maybe I am wrong. I shall read the Khan Academy article in a bit.
Thanks again.
You're quite welcome Hazel. I'm glad I could be of some help.
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