2.82 describe how responses can be controlled by nervous or by hormonal communication and understand the differences between the two systems
The nervous system controls your actions. It coordinates different parts of you body so that they work together and are able to bring about the correct responses. It coordinates you muscles, similarly it also works things we don’t notice happening such as swallowing, blinking and breathing.
The hormonal system also coordinates the body. Hormones are chemicals produced by glands, which are carried around the body in the blood. They tell different parts of the body what to do.
The differences -
Nervous system:
- Information passes as electrical impulses alone neurons
- Effects are rapid and short-lived
- Affects particular organs
- Often involves reflexes
Hormonal System:
- Information passes as chemical messengers in the blood
- Effects are usually slow and longer lasting
- Affects the whole of the body
- Controls growth, development, metabolism and reproduction
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