CBSE Class 10 Science 2023 Delhi Set 2

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Question : 7
Total: 11
Name the hormone secreted in scary situations by animals. Write any three responses which enable the animal body to deal with it.
Solution:  
In scary situation, a hormone called adrenaline is secreted from the adrenal glands. Three responses which enable human body to deal with it are:
1. The target organs or the specific tissues on which it acts include the heart. As a result, the heart beats faster, resulting in supply of more oxygen to our muscles.
2. The blood to the digestive system and skin is reduced due to contraction of muscles around small arteries in these organs. This diverts the blood to our skeletal muscles.
3. The breathing rate also increases because of the contractions of the diaphragm and the rib muscles.
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