What is released at the site to initiate action potential

Neurons communicate with the cells that they are controlled by releasing chemicals, called neurotransmitters, at a synapse. ... The other answer would be - The neurotransmitter is released at the site to initiate action potential and carry the signal through the body

answer: 20 percent

the fish culture has become a developing commercial practice in developing countries which is already prominent in developed countries of the world. the major fish protein demand is being supplemented in developing countries is   fishing to meet the needs of the growing population. therefore, in some developing nations, the percentage of animal protein from fish in the diet can be as high as 20 percent.