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Fill inthe blanks:
1. We drink more water in summer season.
2. Our body temperature is maintained at about 37 degree celcius in any season..
Match the Pair:
True or False:
1. Hydra-Primitive nervous system
2. Pitcher plant-Insects
Answer in one sentence:
1. What is the normal temperature of healthy person?
Ans: The normal temperature of healthy person is 37 degree celsius.
2. Which are the main parts of the nervous system?
Ans: The brain, the spinal cord and the nerves are the main parts of nervous system.
Answer in Short:
1. Give four examples of reflex actions.
Ans: 1. Our mouth waters at sight of tamarinds. 2. We our ears with hands when someone light cracker. 3. We pulled our hands when it touches to something hot. 4. We scream when needle pricks our hand. These are the examples of reflex actions.
Answer the following questions based on diagram:
Give Reasons:
1. We drink more water in summer.
Ans: Our body maintains the temperature at about 370C. In summer, the higher temperature of the air raises the temperature of our skin. To reduce this temperature the skin produces sweat. The evaporation of sweat helps lower the skin temperature. As the body loses water due to sweating, we feel thirsty. That is why we drink more water in summer.
Short Note:
Homeostasis:
Several changes our in everyday life. Depending on these changes the process in our body also undergoes changes. The main purpose of these changes is that whole life goes on at proper level. The optimum level of the body in given conditions is maintained in all circumstances. This continues process of adjustment is called homeostasis.
Define:
1. Reflex Actions:
Actions that takes place even without messages reaching the brain with the help of spinal cord are called reflex actions.
2. Hormones:
Chemical substances that control the life process and movements of animals are called hormones.
1. Growth is reversible process. -False
2. As the body loses water due to sweat we feel thirsty. - True
1. Which system in the body is shown in the picture?
Ans: Nervous system in the body is shown in the picture.
2. What is the use of this system in our body?
Ans: Nervous system controls and co-ordinates all the life process in the body.
3. What are the main parts of this system?
Ans: The brain, the spinal cord and the nerves are the main part of nervous system.
4. What are the two parts of this system?
Ans: Central nervous system and peripheral nervous system are parts of this system.
5. What is the main function of this system?
Ans: Nervous system regulates all the process in our body.