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Tissues Test - 58

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Tissues Test - 58
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  • Question 1
    1 / -0
    The epithelium which forms the inner wall of blood vessels is_____________
    Solution
    • Endothelium is a term used to describe simple squamous epithelium that lines the blood vessels. 
    • The endothelium is the thin layer of cells that line the interior surface of blood vessels.
    • These endothelial cells lines the entire circulatory system, from the heart to the smallest capillary. 
    • Hence, the correct answer is option is C.
  • Question 2
    1 / -0
    A nucleated differentiated cell that has lost the power to divide is:
    Solution
    Nucleated differentiated cells that have lost the power to the division are nerve cells. These are the cells of the nervous system and carry electrical messages and signals throughout the body. They have lost their power to divide because the existing ones can grow new connections by losing the old ones and also these cells need oxygen and nutrients and if it divides rapidly and get packed, it will become difficult to supply and hence will starve.
    So, the correct answer is option A.
  • Question 3
    1 / -0
    Consider the following features of tissue.
    A. They are similar and dissimilar cells.
    B. They perform a common function.
    C. They have a common origin.
    D. They are characterized by the distinct cell wall.
    The correct ones are grouped in:
    Solution
    • A tissue is the group of cells of the common origin that are structurally similar or sometimes dissimilar and perform a particular function. 
    • Only plant cells are characterized by the distinct cell wall. Animal cells do not have cell wall.

    Therefore, the correct answer is option C.
  • Question 4
    1 / -0
    Tendon connects
    Solution
    Correct Answer: B
    Explanation:
    • Tendon comes under the white fibrous connective tissue(dense regular connective tissue).
    • In tendons, a large number of the collagen bundle are arranged in parallel series.
    • Tendons are thick thread-like inelastic strings or cords of high tensile strength. being elastic they prevent overstretching.
    • Tendons connect skeletal muscles to bones.
    • Hence, the correct answer is Bone with muscles.
  • Question 5
    1 / -0
    In cardiac muscles, certain structure allows the cells to contract as a unit and is known as
    Solution
    Intercalated discs are microscopic structures of cardiac muscle. They occur at the Z-line of the sarcomere and are made of fascia adherens, desmosomes and gap junctions. They are cross bands that separate the opposite ends of myocytes. These discs hold the adjacent cells together and allow diffusion of ions across the cells due to which muscle impulses travel rapidly from cell to cell leading to their contraction. Thus the correct answer is option D.

  • Question 6
    1 / -0
    Striated muscles that are voluntary in nature are __________.
    Solution
    Skeletal muscles are attached to the bones and have the main function of contracting to facilitate the movement of our skeleton. 
    They are also sometimes known as striated muscles due to their appearance (alternate light and dark bands are present). Skeletal muscles are voluntary muscles because we have direct control over them.
    Hence, the correct answer is option A.
  • Question 7
    1 / -0
    Which of the following cells are involved in the defensive mechanism?
    Solution
    a) Neutrophils are phagocytic leukocytes that engulf pathogens which are destroyed by the granules in them.
    b) Lymphocytes are white blood that are concentrated in central lymphoid organs and tissues. There are two types of lymphocytes, B lymphocytes and T lymphocytes. T lymphocytes play a role in cell-mediated immunity and B lymphocytes are involved in humoral immune response.
    c) Macrophages are made from white blood cells called monocytes and engulf the dead cells. All the three play a role in immunity.  
    So, the correct answer is option D.
  • Question 8
    1 / -0
    Specialized epidermal cells seen around the stomata are___________
    Solution
    • Guard cells are cells surrounding each stoma. They help to regulate the rate of transpiration by opening and closing the stomata. 
    • Lenticels are one of many raised pores in the stem of a woody plant that allows gas exchange between the atmosphere and the internal tissues.
    • Bulliform cells are large, bubble-shaped epidermal cells that occur in groups on the upper surface of the leaves of many grasses. Loss of turgor pressure in these cells causes leaves to "roll-up" during water stress. 
    • Subsidiary cell is a plant epidermal cell that is located next to a guard cell in the stoma of a leaf and differs in structure from other epidermal cells; Also called an accessory cell.

    Therefore, the correct answer is option C.
  • Question 9
    1 / -0
    The striated skeletal muscles are____________.
    Solution
    • Skeletal muscle cells are multinucleated as individual cells fuse to form larger units with more than one nucleus.
    • The skeletal muscles are cylindrical, striated, unbranched, and are under voluntary control.  
    Therefore, the correct answer is option A.

  • Question 10
    1 / -0
    Which of the following is not a feature or function of epidermis?
    Solution
    • The epidermis is the outermost covering and acts as a protective layer. it is formed initially from the protoderm. 
    • These are thin-walled as they are generally made up of parenchymatous cells. 
    • The epidermis serves several functions- it protects against mechanical injury  water loss, regulates gas exchange, secretes metabolic compounds, and (especially in roots) absorbs water and mineral nutrients. 
    • The epidermal tissue includes several differentiated cell types - guard cells, subsidiary cells, and epidermal hairs (trichomes). They have thin-walled cells. 

    Therefore, the correct answer is option A.
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