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Tissues Test - 87

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Tissues Test - 87
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Weekly Quiz Competition
  • Question 1
    1 / -0
    The blood cells with polymorphic nucleus are?
    Solution
    Granulocytes are a category of white blood cells characterized by the presence of granules in their cytoplasm. They are also called polymorphonuclear leukocytes or polymorphonuclear neutrophils because of the varying shapes of the nucleus, which is usually lobed into three segments. These are granulocytes involved in fighting off pathogens, such as bacteria and fungi.
    So the correct answer is 'Granulocytes'.
  • Question 2
    1 / -0
    Select the incorrect statement out of the following. 
    Solution
    (A) Neutrophils are the most abundant white blood cell, consisting of $$60-70\%$$ of the leukocytes, they defend against bacterial or fungal infection. They are referred to as PMN leukocytes.
    (B) Eosinophil compose about $$2-4\%$$ of WBC. The count fluctuates. It rises in response to allergies, parasitic infections, collagen diseases, and disease of the spleen and CNS. That is they resist infection.
    (C) Basophils are chiefly responsible for allergic and antigen response by releasing the chemical histamine & serotonin also heparin.
    (D) Red Blood cells lack a nucleus, but are biconcave in shape, not Biconvex
    Hence the correct option is D.

  • Question 3
    1 / -0
    Which of the following muscles do not get fatigued fast?
    Solution
    The cells of cardiac muscles have a greater number of mitochondria than the cells present in other muscles. So, the cells of cardiac muscles get plenty of energy, produced by mitochondria. Mitochondria are responsible for the production of energy. Therefore, cardiac muscles do not get fatigued.
    So, the correct answer is option B.
  • Question 4
    1 / -0
    Mark the incorrect statement regarding cardiac muscles.
    Solution

    Cardiac muscles are involuntary and intrinsically controlled, striated, branched, and single nucleated. They are to be an involuntary tissue because it is controlled unconsciously by our brain. 

    Thus, the correct answer is 'They do not show striations'.
  • Question 5
    1 / -0
    Squamous epithelium forms inner lining of which of the following?
    I. Blood vessels
    II. Lung alveoli
    III. Salivary duct
  • Question 6
    1 / -0
    Tonsils in the pharynx are made up of 
    Solution

    Thick fibers of muscle and connective tissue attach the pharynx to the base of the skull. So the correct option is ' connective tissue'.
  • Question 7
    1 / -0
    Which among the following does not exhibit phagocytic activity?
    Solution
    Phagocytotic activity is the process of engulfing or ingestion of food or bacteria.
    • Monocytes - They are the largest type of leucocytes present in about 10-20% in blood. They are phagocytotic in nature and engulf bacteria.
    • Neutrophils - There are also many in number in leucocytes. They are phagocytotic in nature and thus engulf harmful bacteria and germs.
    • Basophils - They are present in the very least amount in the leucocytes. Their main function is the prevention of blood clotting and other allergic reactions.
    • Macrophages - They are formed from monocytes in the leucocytes. They are phagocytes that engulf and destroy all the bacteria.
    So, the correct option is 'Basophil'.
  • Question 8
    1 / -0
    Rouleaux formation is related to which of the cell/tissue:
    Solution
    The correct answer is A.
    Rouleaux formation refers to the stacking of 4 or more red blood cells. It is a characteristic feature of RBCs.
  • Question 9
    1 / -0
    In a muscle,the functional units of contraction is the :
    Solution
    The functional unit of contraction of muscles is the sarcomere. It is the region bordered by 2 Z lines. It contains both thick and thin filaments which slide over each other during contraction and relaxation.
    Hence the correct option is A.
  • Question 10
    1 / -0
    Which of the following statement is false?
    Solution
    Correct Option: C
    Explanation:
    • The cytoplasm of striated muscle is known as sarcoplasm.
    • The endoplasm is the dense region in the cytoplasm that is mostly granulated.
    Hence, the false statement is: The cytoplasm of striated muscle is called endoplasm.
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