21. Upper most layer of skin is called?

1. 1. Epidermis

   
   
   

   2. Protodermis

   
   
   

   3. Dermis

   
   
   

   4. None of these

   
   
   

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   N/A

   Correct Option: A

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22. With reference to a normal human being which one of the following statements is not correct?

1. 1. Compared with skeletal muscles, the tissues of intestine are mush more affected by the shortage of oxygen.

   
   
   

   2. In the arterial blood. haemoglobin is normally 97% saturated with oxygen

   
   
   

   3. Pulmonary artery contains deoxygenated blood.

   
   
   

   4. About 70% of the carbon dioxide entering the erythrocytes react with the water to form carbonic acid.

   
   
   

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   N/A

   Correct Option: A

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23. Consider the following types of cells
    1. Easinophil
    2. Lymphocytes
    3. Monocytes
    4. Neutrophils
    Which of the above are white blood corpuscles

1. 1. 1 and 2

   
   
   

   2. 1, 2 and 4

   
   
   

   3. 3 and 4

   
   
   

   4. 1, 2, 3 and 4

   
   
   

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   N/A

   Correct Option: D

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24. White blood cells act

1. 1. As a defence against infection

   
   
   

   2. As source of energy

   
   
   

   3. For clotting of blood

   
   
   

   4. As a medium for oxygen transport from lung to tissue

   
   
   

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   N/A

   Correct Option: A

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25. Which part of the alimentary canal in human beings receives the secretions of liver and pancrease through a common duct?

1. 1. Stomach

   
   
   

   2. Duodenum

   
   
   

   3. Junction of Jejunum and Ileum

   
   
   

   4. Ileurm

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: B

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