The element of this cycle makes up 78% of the atmosphere

Nitrogen makes up 78% of the atmosphere

where is the diagram?

if you insert the diagram ill be able to you

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d