Student B's reaction is coordinated by the nervous system. Give two ways that coordination by the endocrine system is different from coordination by the nervous system.

The nervous system and endocrine system are the body's two main coordination systems, but they work in very different ways: | Feature | Nervous System | Endocrine System | | :--- | :--- | :--- | | **Signal Type** | Electrical impulses | Chemical hormones | | **Transmission**| Along nerve cells (neurones) | Via the bloodstream | | **Speed** | Very fast (milliseconds) | Slower (seconds to hours) | | **Duration** | Short-lived effect | Long-lasting effect | | **Target** | Specific (e.g., one muscle) | Widespread (target cells anywhere in the body) | Any two of these differences would be a correct answer.