There are about 5 main structures that make up a neuron. <span>Basically, dendrites, cell body (soma), and axon. In addition, the part of the soma leading to the axon is called the axon hillock. Hope this answers the question. Have a nice day.</span>
When SA Node triggers Atria goes into Systole !! and when the signal reaches to AV node and from there it goes to Bundle of His making Ventricle to systole or constrict !!
So your answer is Systole !!
