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Structural Organisation in Animals Test - 4

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Structural Organisation in Animals Test - 4
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  • Question 1
    1 / -0

    Myelin sheath is derived from

    Solution

    The outer layer of axon of nerve cells is called myelin sheath. Myelin sheath is derived from Schwann cells.

  • Question 2
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    Antibodies are formed by

    Solution

    Antibodies are formed against any foreign body entering the body. It is formed by plasma cell, globulins that develop resistance against particular type of disease.

  • Question 3
    1 / -0

    The cell lining the blood vessels are

    Solution

    Endothelium is a type of epithelium that lines the interior surface of blood vessels and lymphatic vessels, forming an interface between circulating blood or lymph in the lumen and the rest of the vessel wall. It is a thin layer of simple squamous called endothelial cells

  • Question 4
    1 / -0

    Cardiac muscles are

    Solution

    Cardiac muscle tissue is a contractile tissue present only in the heart. The cardiac muscle fibres are elongated, branched and uninucleate. They appear striated due to the presence of alternate light and dark band. Cardiac muscles are self-contracting and involuntary in nature. They contract in rythmic fashion and help the heart to pump the blood.

  • Question 5
    1 / -0

    Which of the following structure is Ectodermal in origin?

    Solution

    The ectoderm differentiates to form the nervous system (spine, peripheral nerves and brain), tooth enamel and the epidermis, the outer part of integument. It also forms the lining of mouth, anus, nostrils, sweat glands, hair and nails.

  • Question 6
    1 / -0

    A normal adult man and woman have ---------WBC per cubic millimetre.

    Solution

    A normal adult male and female have about 4.5 to 5 million of WBC per cubic millimeterof blood. The number of white blood cells increases during infection against pathogens.

  • Question 7
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    The most active phagocytic white blood cells are

    Solution

    The most active phagocytic white blood cells are nerutophils and monocytes. These cells try to engulf the microbes that enters the blood to cause disease.

  • Question 8
    1 / -0

    Nasal septum contains

    Solution

    The nasal septum of human beings consist of hyaline cartilage which is highly elastic having collagen. It contains no nerves or blood vessels and is pearly bluish in colour.

  • Question 9
    1 / -0

    Lymph contains 

    Solution

    Lymph contains serum and WBC. Lymph is called as extracellular fluid that help in transport of fat and protein. It contains WBC, so also help in protection against the infection.

  • Question 10
    1 / -0

    Intercalated discs occurs

    Solution

    Intercalated discs are microscopic identifying features of cardiac muscles fibres. Individual heart muscle cells are connected by intercalated discs to work as a single functional organ.

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