Which Organ System is Most Directly Reponsible for the Signals

Question

Which organ system is most directly reponsible for the signals that lead to lactation?
A) endocrine
B) respiratory
C) skeletal
D) digestive
E) nervous

Accepted Answer

The endocrine system, specifically the hormone prolactin produced by the pituitary gland, is primarily responsible for the signals that lead to lactation.