The statement that is true about how the nervous system interacts with other body systems is:
The nervous system controls the digestive system by sending signals to the stomach, telling it to contract and digest food.
The nervous system does play a significant role in regulating the digestive system through signals that control the contraction of muscles in the stomach and intestines, promoting digestion.
The other statements contain inaccuracies:
- The nervous system does not send signals to the heart to make more blood; instead, it regulates heart rate and force of contraction.
- The nervous system does not directly send signals to ligaments; it sends signals to muscles to facilitate movement.