Possible example based on this picture
1. Pain is felt (A SENSORY NEURONE) from the injury (THE STIMULUS).
2. SENSORY NEURONES transfer this information to the brain (CENTRAL NERVOUS SYSTEM)
3. The brain assesses the information
4. MOTOR NEURONES causes muscles in the arm (THE EFFECTOR) to contract.
5. The arm is cradled or lifted to protect it. (THE RESPONSE)
IN SIMPLE LANGUAGE
Stimulate means to excite. A stimulus creates a reaction in our body. Sensor neurones are a type of specialised cell that can detect changes in the environment, temperature, pain, taste, sounds etc. Motor neurones are a type of specialised cell that cause muscles to contract. Motor refers to movement. The effector is the part of the body that responds. In this case, muscles in the arm. The response refers to how our body reacts. In this example, lifting the arm for protection.