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    4. Erythrocytes MCQ - Practice Questions with Answers

    Erythrocytes MCQ - Practice Questions with Answers

    Updated on Sep 18, 2023 18:34 AM

    Quick Facts

    • 26 Questions around this concept.

    Solve by difficulty

    QuestionEASY

    ESR stands


     

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    There is no DNA in:

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    Which one of the following types of cells lack nucleus in humans?
     

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    Which one of the following blood cells is involved in antibody production?

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    RBC in fishes, reptiles and birds are/is
     

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    Concepts Covered - 1

    Erythrocytes or Red Blood Cells
    • These are the cells which give blood its characteristic red colour. 
    • The red colour is due to the presence of an iron-containing compound called haemoglobin.
    • Mammalian erythrocytes are enucleated and biconcave. 
    • The biconcave shape is important as it provides a large surface-to-volume ratio to facilitate gas exchange. 
    • The nucleus and other organelles are lost during development and maturation of RBC. 
    • The number of RBC per microlitre of blood is about 5 million in men and 4.5 million in women. 
    • Formation of RBCs is called erythropoiesis. It takes place in the liver and spleen during embryonic stages. From birth onwards, it takes place in bone marrow. 
    • A term erythrocytopenia is used for denoting the decreased number of erythrocytes. 
    • Similarly, the term erythrocytosis or polycythemia is used to denote an increased number of erythrocytes.
    • The average lifespan of human erythrocytes is of 120 days. 
    • RBCs are important for the transport of oxygen and carbon dioxide, maintenance of pH in blood etc. 


     

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    Erythrocytes or Red Blood Cells

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