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Tissues Test - 45

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Tissues Test - 45
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Weekly Quiz Competition
  • Question 1
    1 / -0
    The terminal bronchioles initially have 
    Solution
    The epithelium of the bronchioles starts with a simple ciliated columnar epithelium. As the bronchioles decreases in size, the epithelium changes to simple ciliated cuboidal epithelium.
  • Question 2
    1 / -0
    Upper and lower epidermis can be traced in
    Solution
    Upper and lower epidermis can be traced in phylloclades. Phylloclade is the flattened structure with the adaxial and abaxial epidermis. It is a modified stem which functions as a leaf. It perform photosynthesis. Example Opuntia
    Thus, the correct answer is option D.
  • Question 3
    1 / -0
    Compound squamous epithelium occurs in
    Solution
    Compound squamous epithelium occurs in the pharynx. The main function of this type of epithelium is the protection to underlying tissues against mechanical, chemical, thermal or osmotic stresses. Being multi-layered, it has little role in secretion and absorption
    So, the correct answer is 'Pharynx'
  • Question 4
    1 / -0
    The inner lining of blood vessels and heart is called 'tessellated epithelium', which is actually
    Solution

    • Based on the number of layers, epithelia are mainly of three types, simple, stratified, and pseudostratified.
    • Based on the cell shape, epithelia are of three types, squamous, cuboidal and columnar.
    • Various combinations of the above mentioned six types of epithelia are found in various locations of the body, each serving some unique function.
    • Cells of squamous epithelium having wavy outlines comprise what is called the tessellated epithelium. For example, the epithelium lining the blood vessels.

    So the correct answer is 'Simple squamous with wavy appearance.'
  • Question 5
    1 / -0
    Motor cells help in
    Solution
    Bulliform cells or motor 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 stress. During drought, the loss of moisture through vacuoles induces bulliform cells to cause the leaves of many grass species to close as the two edges of the grass blade fold up toward each other. Once adequate water is available, these cells enlarge and the leaves open again. Folded leaves offer less exposure to sunlight, so they are heated less thus, reducing evaporation and conserving the remaining water in the plant. They are thought to play a role in the unfolding of developing leaves and in the rolling and unrolling of mature leaves in response to alternating wet and dry periods. So, motor cells helps in inward rolling of leaves and not in transpiration or guttation. 
    Thus, the correct answer is option A.
  • Question 6
    1 / -0
    An epithelial tissue which has thin flat cells, arranged edge to edge so as to appear like closely packed tiles, is found to be present in
    Solution
    Epithelial tissue is a sheet of cells that covers a body surface or lines a body cavity. An epithelial tissue which has thin flat cells, arranged edge to edge so as to appear like closely packed tiles is known as squamous epithelium. It covers moist surface which has minimum wear and tear by friction such as inner lining of cheeks, lining of blood vessels, alveoli, etc.
    So, the correct answer is option D.
  • Question 7
    1 / -0
    Cotton fiber is part of 
    Solution
    Cotton fibers are composed of cells that arise from the outer epidermal layer of the cotton seed. Cotton is a soft, fluffy staple fiber that grows in a protective capsule. 
    So, the correct answer is option A.
  • Question 8
    1 / -0
    Which statement is true about WBC?
    Solution
    WBC's are amoeboid in shape due to which they can easily squeeze through the walls of the capillaries at the site of injury by the process known as diapedesis and engulf the damaged cells by phagocytosis. They are nucleated cells and excess of WBCs causes cancer known as leukaemia. 
    So, the correct answer is option C.
  • Question 9
    1 / -0
    Simple epithelium is made up of
    Solution
    Simple epithelium is one cell thick, i.e., every cell is in direct contact with the underlying basement membrane. It consists of compactly packed cells. In general, it is found where absorption and filtration occur.
    Hence the correct option is D.
  • Question 10
    1 / -0
    Plasma cell 
    Solution
    A plasma cell is a modified B-lymphocyte . They are transported by the blood plasma and the lymphatic system. Plasma cells originate in the bone marrow; B cells differentiate into plasma cells that produce antibody molecules closely modeled after the receptors of the precursor B cell. Once released into the blood and lymph, these antibody molecules bind to the target antigen and initiate its neutralization or destruction.
    Hence the correct option is A.
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