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Structural Organisation in Animals Test - 39

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Structural Organisation in Animals Test - 39
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  • Question 1
    1 / -0
    Which of the following is correct with respect to adipose tissue?
    Solution
    • Adipose tissue is a type of connective tissue. 
    • It stores fat. It is found below the skin and between internal organs. 
    • The cells of this tissue are filled with fat globules. The storage of fats and it is also act as an insulator.
    So, the correct answer is option D.
  • Question 2
    1 / -0
    Chloragogen cells of earthworm are similar to which organ of vertebrates?
    Solution
    Chloragogen cells of earthworm are similar to the liver of vertebrates. The cells store glycogen and neutralize toxins, are yellowish in colour due to the presence of yellow granules, called as chloragosomes and are present in coelomic fluid of some annelids. These cells are derived from the inner coelomic epithelium and help in excretory functions, as most commonly demonstrated in earthworms. They have characteristic vesicular bulging, which store and transport substances, like glycogen and nitrogenous wastes. They take part in the deamination of amino acids and synthesis of urea. 
    Therefore, the correct answer is option A.
  • Question 3
    1 / -0
    Which of the following tissue form the thin surface for the gas exchange in the lungs ?
    Solution
    The alveoli in the lungs are where the gaseous exchange takes place. Alveoli are lined by a single layer of squamous epithelial cells. These are the thin layered cells which allows the passage of the gases through the tissues during external respiration.
    Thus, the correct answer is option A. 
  • Question 4
    1 / -0
    Epithelial tissue with thin flat cells and which appears like packing tiles are seen in:
    Solution
    The simple squamous epithelial tissues are present in the skin. These cells are present in the inner surface of the cheek. These cells are seen as a single layer of cells placed on the basement membrane in the form of tiles. They are compactly arranged without any intercellular spaces, similar to the packing and arrangement of tiles.
    Thus, the correct answer is option C. 
  • Question 5
    1 / -0
    Paired spermathecae occur in Pheretima in which of the following segments?
    Solution
    There are 4 pairs of small pear shaped bilobed spermathecae, which receive sperms from another worm during copulation and store them in their diverticula in Pheretima and in ampullae in other earthworms. They are present in 5 and 6, 6 and 7, 7 and 8 and 8 and 9 segments. 
    Therefore, the correct answer is option C.
  • Question 6
    1 / -0
    Which of the given figures represents a cardiac muscle?

    Solution
    Cardiac muscle (heart muscle) is involuntary, striated muscle that is found in the walls and histological foundation of the heart, specifically the myocardium.
    Image B is correct as it has striations as well as junction cells. They are also branched. 
  • Question 7
    1 / -0
    A neuron transmits information through
    Solution
    Neurons are cells that send and receive electro-chemical signals to and from the brain and nervous system. There are about 100 billion neurons in the brain. 
  • Question 8
    1 / -0
    Cardiac muscle requires ................. for contraction to occur.
    Solution
    Cardiac muscle (heart muscle) is involuntary, striated muscle that is found in the walls and histological foundation of the heart, specifically the myocardium.
    Cardiac muscle requires extracellular calcium ions for contraction to occur. 
    Hence the correct option is B.
  • Question 9
    1 / -0
    Label the A in the given diagram.

    Solution

    Correct Option: D

    Explanation:

    The location of transmission of electrical nerve impulses between 2 nerve cells (neurons) or between a nerve cell and a muscle cell is called a synapse.

    Hence, the structure labelled as A in the diagram of the neurons is called the synapse.

  • Question 10
    1 / -0
    Which epithelial cells cover the lining of mouth and oesophagus?
    Solution
    Simple squamous cells have the appearance of thin, flat plates. The shape of the nucleus usually corresponds to the cell form and help to identify the type of epithelium. Squamous cells, for example, tend to have horizontally flattened, elliptical nuclei because of the thin flattened form of the cell. They form the lining of cavities such as the mouth, blood vessels, heart and lungs and make up the outer layers of the skin.
    Therefore, the correct answer is option C.
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