What are the three particles of an atom?
a. proton, ion, and valencium
b. proton, neutron, and electron
c. electron, proton, and isotope
d. neutron, electron, and ion

stress fractures occur largely in the feet and legs and are common in sports that require repetitive impact, primarily running/jumping sports such as gymnastics or track and field.

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