When you pet a dog, specialized neurons called sensory receptors receive a stimulus from the environment. The brain processes the information from action potentials and interprets them as a feeling of warmth and softness. Your brain sends a signal back down the spinal cord then out through the peripheral nervous system to your motor neurons. The signals your motor neurons receive stimulate muscles in your hands and fingers to contract, helping you continue petting or scratching the dog.
What body systems are described as working together in the paragraph above?
Question 3 options:
Muscular and endocrine system
Circulatory and digestive system
Nervous and muscular system
Respiratory and nervous system