After Ralph realized that the shadows outside his window were only the trees in the yard,his blood pressure decreased and his heartbeat slowed.These physical reactions were most directly regulated by his
A) parasympathetic nervous system.
B) sympathetic nervous system.
C) somatic nervous system.
D) sensory nervous system.

Question

Quizplus · Accepted Answer

The parasympathetic nervous system is responsible for regulating responses that promote relaxation and conserves energy. This includes decreasing blood pressure and slowing the heartbeat, which would be the appropriate response once Ralph realized that the shadows outside his window were only trees. The sympathetic nervous system, on the other hand, is responsible for activating the body's fight or flight response, which would have been inappropriate in this situation. The somatic nervous system controls voluntary movements and the sensory nervous system is responsible for transmitting sensory information to the brain.

After Ralph Realized That the Shadows Outside His Window Were