A word is one or more sounds that in combination have a specific meaning assigned by a language. The symbolic meaning of words can be so powerful that people are willing to risk their lives for them or take the lives of others.
A nerve impulse is the relaying of a coded signal from a nerve cell to an effector (a muscle cell, a gland cell or another nerve cell) in response to a stimulus. It is the means by which a nerve cell communicates with another cell.
â¢Action potential âthe reversal of charges across the cell membrane from negative to positive, also called a nerve impulse â¢As the impulse passes, potassium channels open, allowing K+ to flow out, restoring resting potential â¢Nerve impulses at one point trigger an impulse at the next point, like a row of falling dominoes