Where does the arrow point to in a food chain?

It points to the next animal on the food chain. Normally it will point from prey to predator. In other words, it points from the animal that is eaten to the one that eats it. For example, a worm points to a bird. Hope this helps.

Explanation:

its a map of something

travels along an axon. this triggers a wave of electrical activity that passes from the cell body along the length of the axon to the synapse