The right option is d. norepinephrine; acetylcholine
Sympathetic is to norepinephrine as parasympathetic is to acetylcholine.
Norepinephrine is a hormone released from the sympathetic nervous system of the body in response to stress. The release of norepinephrine influences other organs and body functions such as causing increase breathing rate, high glucose production and increase in the amount of oxygen supplied to the brain.
Acetylcholine is an organic chemical produced from the parasympathetic nervous system of the body. Acetylcholine functions in the body by reducing heart rate, contracting smooth muscles, and increasing bodily secretions.
