Put a (/) if the sentence explains how the nervous system work with the musculo skeletal, digestive, respiratory or circulatory systems of the body and ( X) if not.
1. The brain helps monitor respiratory volume and blood gas level especially when you do strenuous activities. / or x
2. The nerves work with muscles connected to hair follicles. / or x
3. The nerves protect the body against microorganisms. / or x
4. The brain works with the contraction of skeletal muscles as you move your body. / or x
5. The spinnl cord allows the digestive system to regulate heart rate. / or x