Control And Coordination


 

Control And Coordination logoSubject: Biology    Exam: Medical Foundation 2 Years

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Important Points

The working together of the various organs of an organism in a systematic manner so as to produce a proper response to the stimulus, is called coordination.
Plants show two different types of movements:
(i)Movements independent of growth (Nastic movements)
Movements due to growth (Tropic movements or tropism)
Phototropism is the movement of a part of the plant in response to light. Shoots generally grow towards light and are said to be positively phototropic, while roots grow away from light and are said to be negatively phototropic.
Geotropism is the upward and downward growth of shoots and roots in response to the pull of earth or gravity.
In animals two kinds of coordination - nervous and chemical - are present. The nervous coordination is brought about by the nervous system and the chemical coordination by hormones
 
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