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Science chapter - nervous system questions Answers

   Nervous system


Ques-ans

One word ques/ans


Ques-1 Name the main controlling unit of human body.

Ans- Brain.


Ques-2. ____ is the largest part of the brain.

Ans- Cerebrum.


Ques-3. Name the other name of medulla oblongata.

Ans - Brain stem.


Ques-4. Which of the nerves carry message from the sense organs?

Ans - sensory nerves.


Ques-5. Reflex action are controlled by the_____.

Ans- spinal cord.


Ques-6. Which of the nerves are present in our ear?

Ans- Auditory nerves.


Ques- 7. Name the small egg shaped part of our brain.

Ans- cerebellum.


Ques-8. Nerves are made up of special cells called ____.

Ans- neurons or nerve cells






Very short ques /ans


Ques-1. Write the name of all the three main parts of our brain.

Ans- 1) cerebrum

         2) cerebellum

        3) medulla oblongata


Ques-2.  Define cornea?

Ans- A circular transparent area of our eyes is called cornea.


Ques-3. What are the basic elements of the nervous system?

Ans - 1)central nervous system

          2)Peripheral nervous system


Ques-4. Why is Cerebrum called the centre of intelligence?

Ans- Cerebrum helps us to understand, decide and think. Thus, it is called the centre of intelligence.


Ques-5. Define reflex action.

Ans- Automatic response for which we do not think before doing is called reflex action.





              Short ques/ans



Ques- 1.  Explain nervous system?

Ans- The network of nerve cells and fibres which transmits nerve impulses between parts of the body is called nervous system.


Ques- 2 Differentiate between sensory nerves and motor nerves.

Ans- sensory nerves- These nerves carry message from the sense organ to the spinal cord and then to the brain.

Motor nerves- Our brain controls our muscles through these nerves. they carry messages from the brain and the spinner go to the muscles or glands.


Ques-3. What is the function of skin and how can we take care of skin?

Ans- The skin is an organ of touch and feel. It has large number of nerve endings these enable us to feel. It protects us against injuries and germs. 

We can take care of skin by following some steps:-

  1. Wear clean clothes

  2. Apply antiseptic cream on cuts or scratches.

  3. Use dry and clean towel to wipe the skin.



Ques-4. How do we see an object?

Ans- The optic nerve connects the eyes to the brain. The nerve cell in retina send message to the Brain through the optic nerve. The brain reads the message and enable us to see an object.



          Long ques/Ans


Ques-1. What are the functions of different parts of the brain.

Ans- functions of three main parts of the brain are as follow:-

  1. Cerebrum- cerebrum is the largest part of the brain. its surface has many groups and fold. it control the working of our sense organ. Thus we can think, learn, remember, feel and dream.


  1. Cerebellum- cerebellum is a small egg shaped part that lies below the cerebellum at the back of the head. it control the activity of our muscles and co-ordinate all the voluntary actions of a body like running , walking and swimming. it helps us to balance our body.

  2. Medulla oblongata- it connects the brain to the spinal cord. it controls all our involuntary action like breathing and beating of heart it is active even when we are sleep.


Ques-2. Write a brief note on spinal cord with diagram.

Ans- It is a major part of central nervous system. spinal cord is a thick bundle of nerves that connects the brain to all body parts. it starts from the back portion of the brain and continues down to the lower end of our backbone. It protects by backbone. it is responsible for the transfer of information between the brain and the rest of the body. It also control the reflex actions.




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