The Nervous System and Endocrine System Control the Body's Functions

The nervous system and endocrine system control the body's functions by

A) maintaining a constant level of nerve impulses.
B) sending out messages by nerve impulse and hormones.
C) responding only to the internal environment.
D) stimulating the body's reproductive organs.
E) maintaining a constant level of hormones in the blood. The endocrine system and the nervous system are the control systems of the body, both responding to the internal and external stimuli. The nervous system sends messages through nerve impulses, and the endocrine system through hormones.