What is the name for a point along an axon where an impulse jumps?

because the light is a great source of energy for the plants to survive. (i hope this )

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.