Form 4 Biology Exam Papers 2023-2024 | Somaliland

 Lymphatic System -Practice Test with Answer Key

Structured Questions  | Practice Test

Answer the questions in your exercise book and check yourself with the answer key at the end

  1) The diagram below shows the lymphatic system.

a)   Identify the parts labeled A, B, C and D

A.  ……………………………………

B.  …………………………………..

C.  …………………………………..

D.  …………………………………..

b)   What does the lymphatic system consist of?

i)             ………………………………..

ii)            ………………………………..

iii)          …………………………………

iv)          ………………………………..

c)   Restate any two functions of the lymphatic system

i)             ……………………………….

ii)            ………………………………

   2) State any function of the below lymphoid organs

                     i.        Tonsils ……………………………….

                    ii.        Thymus gland ………………………

                   iii.        Spleen………………………………

                  iv.        Lymph nodes ……………………….

   3) What is the function of thymosin hormone secreted by the thymus gland?  …………………………………………………………………………………………………………

  4) What two factors help movement of lymph fluid through 

             lymphatic vessels?

       i)             …………………..… 

     ii)            ………………………

  5) The diagram shows the exchange of substances between blood                                          capillaries and body cells.

 

    a) Identify the fluid that passes out the blood capillary at region ‘A’?

        …………………………………………………………………………

     b) Write down any two substances which the fluid passing out at

              region 'A' contains?

1)   ……………………….

2)   ………………………

     c) Describe the process that causes the fluid to pass out of the blood                                      capillary at region ‘A’?

          ………………………………………………………………………………

     d) Distinguish between blood plasma and the fluid that passes out 

             at region ‘A’?

          ………………………………………………

           ………………………………………………

     e) What process causes the fluid to return back in the blood at

                   region ‘B’?

         ………………………………………………………………………………………

     f) Write down any two substances which the fluid returning back at                   region B contains

1)   ……………………………….

2)   ………………………………

     g) Vessel Y is part of the lymphatic system.

           (i) Name the labeled vessel Y?

                 ……………………………

(ii)          Explain the role of vessel Y?

………………………………

        

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                the lymphatic system note with  practice exam 👇

             Guji link ga hoose si aad u booqato, una soo dajisato 

                casharka Lymphatic system note with practice exam👇👇

           Lymphatic System Notes with Exam Practice F3 Biology.

  

 | ANSWER KEY  |

           Other  Answers may also be possible in some questions

      1) 

           a)     A. Tonsils     B. Thymus gland      C. Spleen     D. Bone marrow

               

          b)  i) Lymphatic vessels    ii) Lymph nodes        iii) Thymus gland     

                iv) Spleen           v) Tonsils

          c)   

               i) Returns tissue fluid back to the blood

              ii) Filtration and removal of foreign harmful substances from the lymph fluid

              iii) Transport of absorbed fatty acids and glycerol from the small intestine

               iv) Protects the body against diseases by producing lymphocytes

    2)

         i) Tonsils - traps and prevent microbes entering the body through the nose 

                           and mouth

         ii) Thymus gland - site of maturation of T-lymphocytes (T-cells)

         iii) Spleen - filters blood from microbes, destroys worn out RBCs, 

                      activation of lymphocytes

         iv) Lymph nodes - filtration of lymph fluid, storage and activation of T- cells and

               B-cells

    3) Thymosin hormone stimulate the maturation of T-lymphocytes (T- cells) in the 

            thymus  gland

     

     4) 

           i) Muscular contractions (contraction of skeletal muscles)

           ii) Pressure changes during breathing in and out 

    

     5)

          a) Tissue fluid or interstitial fluid 

           b) 1. Glucose, 2. Oxygen, 3. Salts, 4. Amino acids, 4. Fatty acids

           c) Hydrostatic pressure

            d) 

                 - Blood plasma is the liquid part of the blood within the blood vessels.

                     Blood plasma contains oxygen, carbon dioxide, glucose, amino acids, salts,                           hormones, plasma proteins, etc.

                   - Tissue fluid is the fluid found between cells of the tissues.

                       Tissue fluid contains all the components of the blood plasma, except plasma                              proteins.

                   Short Answer: Tissue fluid lacks plasma proteins, while blood plasma contains                             plasma   proteins.

              

                 e) Osmotic pressure 

                 f)    1. Carbon dioxide   2. Urea

                 g)  

                        (i) Lymphatic vessel  

  

                       (ii) Lymphatic vessel transports excess tissue fluid remained in the cellular                                    spaces in the  form of lymph fluid and return back to the blood                                                  circulation after filtration.

                                 (Lymphatic vessel returns lymph fluid to the blood circulation)

      

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