Tuesday, January 17, 2012

2.76 - Sensitivity




MRS GREN 
- S - Sensitivity - organisms respond to changes in the environment 
- Changes: light levels, temperature, pressure levels, chemicals 
- to detect changes, the organism needs to have receptors
- to respond to the change, the organism has to have effectors (such as muscles/glands)
- response shows that the organism is able to survive the changes in the environment 



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