Tuesday, January 31, 2012

(I)GCSE Topic 2.82

How responses can be controlled by Nervous or by Hormonal Communication and the differences between the two systems
The Nervous System 
- Controls your actions and co-ordinates the different parts of your body so that they are able to bring around the correct responses. 
- Co-ordinates our muscles so we able to do things such as blink, breath, or swallow. 

The Hormonal System 
- Chemicals produced by glands in the body and are carried around by the blood.
- They also tell the body how to respond. 

Differences
- Nervous System passes along information as electrical impulses. 
- Hormonal System passes information as chemical messengers in the blood.
- Nervous System effects are rapid and short-lived. 
- Hormonal System effects are usually slow and long-lasting. 
- Nervous System effects particular organs. 
- Hormonal Systems effects the whole of the body.
- Nervous Systems often involve reflexes. 
- Hormonal Systems involve the control of growth, development, metabolism and reproduction.

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