Question
What is a reflex action? Explain with the help of an example.
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Answer
The rapid, automatic response to a stimulus which is not under the voluntary action of the brain is called reflex action. Example: Moving our hand away on touching a hot plate.
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Samples of four metals A, B, C and D were taken and added to the following solution one by one. The results obtained have been tabulated as follows.
Use the Table above to answer the following questions about metals A, B, C and D.
| Metal | Iron (II) sulphate | Copper (II) sulphate | Zinc sulphate | Silver nitrate |
| A | No reaction | Displacement | ----- | ----- |
| B | Displacement | ----- | No reaction | ----- |
| C | No reaction | No reaction | No reaction | Displacement |
| D | No reaction | No reaction | No reaction | No reaction |
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