Question Pool Sensations and Responses

Sensations and Responses - SAMAGRA Question Pool & Answers | Class 10 English Medium

Kerala Syllabus SAMAGRA SCERT SAMAGRA Question Pool for Class 10 English Medium Biology Sensations and Responses

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Qn 1.

The brain has a fluid which is formed from blood and reabsorbed into the blood.

  1. Identify the fluid.
  2. What are the functions of that fluid?


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Qn 2.

The following are the indications of some diseases affecting the nervous system. Analyze the symptoms and tabulate in A and B columns by giving the name of the disease as heading.

  • Distruction of Ganglions.
  • Distruction of neuron.
  • Accumulation of an insoluble protein in the neural tissues.
  • Decreased production of dopamine.
  • Loss of body balance.
  • Loss of memory.

 

  • Loss of memory.

A B
  •  
  •  
  •  
  •  
  •  
  •  

 

  • Answer)

     

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    Qn 3.

    Complete the table by placing the following statements suitably in the table given below:

    1. Part of the Central nervous system
    2. Part of the peripheral nervous system
    3. Covered with meninges
    4. All nerves from here are mixed nerves
    5. Cerebral ventricles are filled with CSF
    6. Central canal is filled with CSF
    7. Site of memory and imagination                                                         

     

    Applicable to Brain only

    Applicable to Spinal cord only

    Applicable to both

     

     

     

     

     

     

     

    • Answer)

       

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      Qn 4.

      Mention any three physiological activities retarded due to the action of Sympathetic system.



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      Qn 5.

      Mention any three physiological activities came in to normal state by the action of Parasympathetic system



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      Qn 6.

      Observe the illustration and answer the questions.

      a) Identify A and B.                                                                                                                                 b) Write any two functions of B.



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      Qn 7.

      Copy the diagram and label the parts according to the indicators given below.

      1. The part consist of cerebrospinal fluid.
      2. The part where myelinated nerve cells are present in abundance.
      3. The part conduct  motor impulses from spinal cord to other parts of the body.

       



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      Qn 8.

      Analyse the illustration and answer the questions.                                            Different parts of the body ------(A)----> Central nervous system -----(B)----> Different parts of the body.

      1. Identify the nerves indicated A and B.
      2. Name the nerve that performs the functions of both nerves A and B.

       



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      Qn 9.


      Copy the diagram and label the parts according to the indicators given below

      1. Part which receives impulses.
      2. Part which carries impulses to the cell body.
      3. Part which secretes neurotransmitters


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      Qn 10.

      Analyse the given statements and answer the questions.

      A- "The sympathetic system stimulates all physical activities".

      B - " The sympathetic system stimulates some physical activity and reduces certain functions".

      Which statement do you agree with? Justify your answer.



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      Qn 11.

      Some physical activity will change when you feared.

      1. Identify the part of autonomous nervous system that regulates physical activity in this context.
      2. What are the changes made by this system to the organs heart, liver, and salivary glands?
       


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      Qn 12.

      "Synapse has a major role in controlling the direction of  impulses "                           Justify the statement  citing appropriate evidence.



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      Qn 13.

      Analyse the illustration and answer the questions.

      1. Which nerve is labelled as " X ".

      2. The nerve from the spinal cord, which reaches the muscle in the leg is mixed.Give reason


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      Qn 14.

      Copy the diagram and label the parts based on the indicators given below.

      1.  Part which coordinates muscular activities.
      2. Rod shaped structure seen below the cerebrum.
      3. Part which maintains homeostasis.


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      Qn 15.

      Some parts of the central nervous system is given in the box. Arrange them suitably in the box provided.

      Central canal, cerebrum, thalamus, hypothalamus, meninges,  medulla oblongata‍.

       Statement

      Part

      1. Part which controls involuntary actions.

      1. ............................

      2. part which contain cerebrospinal fluid.

      2. ............................

      3. Part which act as relay station of impulses.

      3. ............................

      4. Largest part of the brain.

      4. ............................

      5.Part which maintains homeostasis.

      5. ............................

      6.Part which protects brain.

      6. ............................



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      Qn 16.
      The following are the indications of some diseases affecting the nervous system. Examine them and complete the table by giving the disease name as headings..
      • Continuous and irregular flow of electric charges in the brain.‍
      • Loss of body balance.
      • Destruction of Ganglions.
      • Loss of memory.
      • Epilepsy due to continuous muscular contraction.
      • Accumulation of an insoluble protein in the neural tissues.                                                                                                                  
      A B C

      Loss of body Balance

      ----

      Continuous and irregular flow of electric charges in the brain

      ----

      ----

      ----

                                       

      • Answer)

         

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        Qn 17.

        The main symptoms of a disease affecting the nervous system are given below. Analyze the symptoms and answer the questions.

        • Loss of body balance.
        • Irregular movement of muscles.
        • Profuse salivation.
        1. Identify the disease.
        2. Write the causes of this disease.


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        Qn 18.

        Copy the diagram and select the parts of the neuron from the following. Write down the function that each of them performs.

        a) Schwann cell  b) Dorsal root   c) Axonite   d) Dentrite   e) Central canal

         



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        Qn 19.

        Formation of impulses in a neuron is illustrated below.

        1. Which factor in diagram A causes charge difference?
        2. What difference can you observe in diagram B, when compared to diagram A.? Write the reason.


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        Qn 20.

        “Impulses are formed due to the change in the distribution of ions on either side of the plasma membrane of a neuron”

        1. What changes occur to the charges on either side of the plasma membrane during impulse formation?  Which factor causes this.?
        2. How does charge difference transmits from one part of the neuron to the other?


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        Qn 21.

        Analyse the statements given tin the box , Give the name of the layers as heading and complete the table.

        • Protects neuron from pressure ,shock etc.. ‌
        • Increases the speed of impulses.
        • Acts as electric insulator. .
        • Layer which protects spinal chord.
        • Contains three membranous layers.
        • Layer which covers and protects the brain

        .........................................

        .........................................

        •  
        •  
        •  
        •  
        •  
        •  

         

        • Answer)
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          Qn 22.

          Identify the odd one and write the common feature of others.

          Touch, Sound, Smell, Thirst

           



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          Qn 23.

          Identify  the word pair relation ship and fill the blanks.                                                Myelin sheath : Covers and protects axon.                                                               ................................ : Covers and protects brain



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          Qn 24.

          Find out the correct statements related to myelin sheath from those given below.

          1. Dendrons of all neurons are covered with myelin sheath .
          2. Myelin sheath in the nerves are made up of schwann cells and that of brain and spinal cord is formed of oligodendrocytes.
          3. Myelin sheath has dark colour.
          4. Myelin sheath reduces the speed of impulses through axon.

           



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          Qn 25.

          Select the correct statement from the following related to myelin sheath.

          1. Myelin sheath covers the dendrons of all neurons .
          2. Schwann cells repeatedly encircle the axon to form Myelin sheath.
          3. Myelin sheath has shiny white colour.
          4. Myelin sheath decreases the speed of impulses through the axon.

           



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          Qn 26.

          Observe the following figure and answer the questions.

          1. Name the part indicated by 'X'.
          2. Write the name of the chemical released by this part and its function.

           



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          Qn 27.

          A fluid fills the internal membranes of Memninges.

          1. Identify the fluid?
          2. Write any one function of this fluid.


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          Qn 28.

          Identify the parts of the nervous system with each of the following functions.

          1. Plays a major role in the maintenance of homeostasis.
          2. Acts as relay station of impulses
          • Answer)
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          Qn 29.

          Analyse the following situations and complete the table.

          1. Blinking of eye when light suddenly falls on the eye.
          2. Hand retract when accidentally touches a hot object.
          Meninges
          Under the control of the spinal cord Under the control of the Cerebrum
             
        • Answer)
          Under the control of the spinal cord
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          Qn 30.

          Analyse the following statements and write the reasons for each.

          1. Cerebral cortex is called Grey matter.
          2. The spinal nerves are mixed nerves.


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          Qn 31.

          Prepare a flow chart using the words given in the box related to reflex arc.

          Motor neuron, receptor, muscle, interneuron, sensory nerve

           



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          Qn 32.

          Impulses transmit in the form of electrical charges. Find the evidence from the following that substantiate this statement.

          1. The change in electrical charge in cell membrane becomes the impulse.
          2. Impulses are the change in the difference in the distribution of ions seen in the cell membrane.
          3. Ionic equilibrium forms the impulse.


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          Qn 33.

          Synapses can regulate the direction of impulses. Select the statement which substantiates this fact.

          1. Neurotransmitters are released in the synaptic cleft from the synaptic knob.
          2. Neurotransmitters are released from one neuron to the next neuron.
          3. Neurotranmitters are released into a neuron from the synaptic knob.


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          Qn 34.

          Find the correct statement related to Interneuron.

          1. Conveys messages to muscles.
          2. Conveys messages to spinal cord.
          3. Rapid responses are produced in relation to sensory impulses.
          4. Conveys impulses to receptors.


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          Qn 35.

          Analyse the statements A and B and identify the suitable explanation from the following.

          S‌tatement A- Alzheimer's disease is due to the destruction of neurons.              Statement B- Accumulation of an insoluble protein in the neural tissues of the brain of Alzheimer's patient occurs.

          1. Statements A and B are true and statement B is the cause of statement A.
          2. Statements A and B are incorrect.
          3. Statement A is correct and B is incorrect.
          4. Statements A and B are true, but statement B is not the cause of statement A.


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          Qn 36.

          The following table includes the parts of brain and their functions. Identify the correct pair from them.

          Parts of brain Function
          ‌1) Cerebrum i) Relay of impulses
          2) Thalamus ii) Maintenance of body equilibrium
          ‌3) Cerebellum iii) Heart beat
          4) Medulla oblongata iv) Maintenance of homeostasis
            v) Sensory experiences
          1. 1-i, 2-iii, 3-ii, 4-iv
          2. 1-v, 2-i, 3-iv, 4- iii
          3. 1-v, 2-ii, 3-ii, 4-i
          4. 1-v, 2-i, 3- ii, 4- iii


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          Qn 37.

          The spinal nerves are made up of definite Dorsal and Ventral roots. Then, the ventral root is made up of: 

          1. With sensory nerve fibres
          2. With motor nerve fibres
          3. With  sensory and motor nerve fibres
          4. None of these.


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          Qn 38.

          Select the correctly labelled one from the following.

          1.  A- White matter, B- Grey matter, C-Dorsal root, D- Ventral root
          2. A- Central canal, B- Grey matter, C-Ventral root, D- Dorsal root
          3. A- Central canal, B- White matter, C-Ventral root, D- Dorsal root
          4. A- Central canal, B- Grey matter, C-Dorsal root, D- Ventral root

           



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          Qn 39.

          Which of the following  indicates grey matter?

          1. The part where the cell body and axon of nerves are present.
          2. The part where the cell body and non myelinated neurons are present.
          3. The part of the brain and the spinal cord, where myelinated neurons are present in abundance.
          4. The part where large amount of axons are present.


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          Qn 40.
          Identify the correct flow chart related to reflex arc.
          1. Receptor--> motor nerve --> Sensory nerve --> Muscle --> Interneuron
          2. Receptor --> motor nerve --> Sensore nerve --> Interneuron --> Muscle

          3.  

            Receptor --> Sensory Nerve --> Interneuron --> Motor neuron --> Muscle

          4.  

            Receptorr -->Motor nerve --> Interneuron --> Sensory Nerve --> Muscle

           



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          Qn 41.

          Analyse the table and rearrange the parts according to the features.

          Part

          Feature

          White matter

          Sensory impulses reach the spinal cord

          Central canal

          Nerve parts without Myelin sheath are seen

          Dorsal root

          Nerve parts with Myelin sheath are seen

          Grey matter Carries cerebrospinal fluid