Thread is to cloth as hair is to braid. Because thread is used to weave the cloth, and hair is used to weave the braid.
Answer:
according to google
"An action potential is part of the process that occurs during the firing of a neuron. During the action potential, part of the neural membrane opens to allow positively charged ions inside the cell and negatively charged ions out. This process causes a rapid increase in the positive charge of the nerve fiber."