Available Answers

1. 1.

   Fill in the blanks.

   1. The reaction of an organism to a stimulus is called ________________.
   2. The basic structural unit of the nervous system is a called a ________________.
   3. ________________ nourishes the brain and absorbs shocks.
   4. ________________ is the largest part of the brain.
   5. ________________ maintains the balance of the body.
2. 2.

   Tick the most appropriate answer.

   1. Short fibres extending from the cell body of a nerve cell are called
      1. dendrons.
      2. axons.
      3. dendrites.
      4. ganglia.
   2. The message that travels along a nerve is called
      1. stimulus.
      2. response.
      3. sensation.
      4. impulse.
   3. Breathing and heartbeat are controlled by the 
      1. cerebellum.
      2. cerebrum.
      3. medulla oblongata.
      4. nerve cells.
   4. This is the centre for intelligence  and  memory.
      1. cerebellum.
      2. cerebrum.
      3. medulla oblongata.
      4. spinal cord.
   5. This part of the brain maintains the balance of the body.
      1. cerebellum
      2. cerebrum
      3. medulla oblongata
      4. spinal cord
3. 3.

   Fill in the blanks.

   1. ________________ is the basic structural unit of the nervous system.
   2. A single long fibre extending from the cell body of a neuron is called ________________.
   3. The central nervous system comprises ________________ and ________________.
   4. The ________________ nervous system comprises the nerves arising from the brain and spinal cord.
   5. The brain is enveloped by three membranes called ________________.
4. 4.

   Match the following.

   1. spinal cord	a. body balance
   2. cerebrum	b. reflex action
   3. cerebellum	c. intelligence and memory
   4. medulla oblongata	d. junction of two neurons
   5. synapse	e. carries messages to the brain
   6. sensory nerve	f. heartbeat

    

5. 5.

   Write true or false. Correct the false  statements.

   1. Each nerve cell consists of a cell body, many short fibres and a long fibre.
   2. Mixed nerves carry impulses from the sense organs to the spinal cord.
   3. The cerebellum is the largest part of the brain.
   4. Thinking, reasoning and memory are controlled by the medulla oblongata.
   5. The cerebrum controls the balance of the body.
6. 6.

   Differentiate between neuron and nerve.