Eye receive stimulus, i.e., the vision of ball. Receptor receives a stimulus and stimulates nerve endings. Impulses are produced. Impulses travei along receptor neuron to the spinal cord. In the spinal cord, they are transmitted via synapse to relay neurons. Through another synapse, impulses are transmitted from relay to effector neuron. Effector neuron receive decision from brain. Effector neuron moves to effector i.e., arm. The bicep/tricep muscles arrange themselves for the response.