Stimulus - change in internal/external environment of an orgnaism resulting in a response
Response - action or change an organism makes in reaction to a stimulus
Stimulus - receptor - coordinator - effector - response
Taxes - directional response to a stimulus
Kinesis - non-directional response to a stimulus where an organism changes its speed and rate of direction change depending on environmental conditions
Phototropism
- Indoleacetic acid diffuses to shaded side
- Stimulates cell elongation and shoots grow to the light
Gravitrophism
- Indoleacetic acid diffuses to lower side of root
- inhibits cell elongation and root grows towards gravity
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