MAHARASHTRA Class 9 - Coordination in Plants and Animals Videos

The pathway called the reflex arc along which the impulse travels: 

Stimulus → Receptor in the sense organ → Sensory neuron → Spinal cord → Association neuron in spinal cord → Motor neuron → Muscle/gland → Response 

The brain is not involved in the reception of the stimulus or passing on instructions to the muscles to react. 

Dark bands in the striations of skeletal muscles contain the protein myosin, while light bands contain the protein actin.