A bottle of concentrated 20 M ammonia solution needs to be diluted to 1 M strength for laboratory use. In order to make up 1 L, of 1 MM,
ammonia solution, how much concentrated ammonia must be diluted?

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