While you are waiting to begin a foot race, you can feel your heart rate go up. This is the _____ at work.

A. sympathetic nervous system
B. parasympathetic nervous system
C. endocrine system
D. central nervous system

Respuesta :

Question: While you are waiting to begin a foot race, you can feel your heart rate go up. This is the _____ at work.                                                             Answer: A.) The sympathetic nervous system
The answer is sympathetic nervous system.