Internal stimuli, such as the arrival of food in the digestive system, normally activate
A) the somatic nervous system.
B) the parasympathetic nervous system.
C) the sympathetic nervous system.
D) both the parasympathetic and sympathetic nervous systems.

Question

Quizplus · Accepted Answer

The parasympathetic nervous system is responsible for the "rest and digest" response in the body, which is activated by internal stimuli such as the arrival of food in the digestive system. This response promotes digestion and absorption of nutrients. The sympathetic nervous system, on the other hand, is responsible for the "fight or flight" response and is activated by external stimuli such as danger or stress. The somatic nervous system controls voluntary muscle movements. Thus, neither the somatic nor the sympathetic nervous systems are normally activated by internal stimuli such as food in the digestive system.

Internal Stimuli, Such as the Arrival of Food in the Digestive