Question
What are the major effects of deforestation ?
Major effects of deforestation:
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| Application of stimulus on a resting nerve |
| ⇓ |
| Permeability of membrane changes |
| ⇓ |
| ______________________________ |
| ⇓ |
| Positive ions inside axon increases |
| ⇓ |
| ________________________________ |
| ⇓ |
| Polarity reverses and depolarisation takes place |
| ⇓ |
| Repolarisation - potassium gates open |
| ⇓ |
| ______________________________ |
| ⇓ |
| ______________________________ |
| ⇓ |
| Axoplasm becomes negatively charged and ECF becomes positive |
| Disease | Vector species |
| (a) Dengue | (i) Anopheles |
| (b) Malaria | (ii) Housefly |
| (c) Filaria | (iii) Culex |
| (d) Typhoid | (iv) Aedes |