Component of bones and found in cell membranes

Is a component of the mineral complex hydroxyapatite in bone along with calcium. Bones are the major storehouse of this, holding nearly 85 percent of our supply. The remaining of this mineral is found in cells of soft tissues with a little bit in extracellular fluid.

Explanation:

climate change and pollution

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