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Structural Organisation in Animals Test - 26

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Structural Organisation in Animals Test - 26
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  • Question 1
    1 / -0
    Skeletal muscle is composed of the repeating structures of .............. and ............... fibers.
    Solution
    Skeletal muscles consist of repeating structures of actin and myosin fibers. They form the thin and thick filaments respectively whose alternative arrangement within the myofibrils give these muscles a striated appearance.
    Hence the correct option is D.
  • Question 2
    1 / -0
    The term histology was introduced by:
    Solution
    Histology can be defined as the study of the microscopic anatomy of the cells and tissues of plants as well as animals. August Mayer coined the term 'histology.'
    Thus, the correct answer is option B.
  • Question 3
    1 / -0
    Protection from ultraviolet rays is provided by
    Solution
    Human skin is repeatedly exposed to the ultraviolet radiation that influences the function and survival of many cell types and is regarded as the main causative factor in the induction of skin cancer. Skin pigmentation is considered to be the most important photoreceptive factor as melanin functions not only as a broadband UV absorbent but also has antioxidant and radical scavenging properties.
    Thus, the correct answer is option D.
  • Question 4
    1 / -0
    Brown adipose tissue is also known as:
    Solution
    The cells of the brown adipose tissue are multilocular. They are smaller than those of white adipose tissue. The nucleus of a mature multilocular adipocyte is in an eccentric position within the cell, but is not flattened as is the nucleus of the unilocular adipocyte, which is white adipose tissue.
    Thus, the correct answer is option (B), 'Multilocular adipose tissue'.
  • Question 5
    1 / -0
    Pseudostratified epithelium can be traced in
    Solution
    A pseudostratified epithelium is a type of epithelium that, though comprising only a single layer of cells, has its cell nuclei positioned in a manner suggestive of stratified epithelia.
    The respiratory lining has the ciliated pseudostratified columnar epithelium.
    The pseudostratified columnar epithelium is found lining the trachea, bronchi, male urethra and a few other places.
    Hence the correct option is C.
  • Question 6
    1 / -0
    Which type of tissue forms glands
    Solution
    Correct Answer: A
    Explanation: 
    • Epithelial tissue or epithelium is fundamental animal tissue that is made up of one or few layers of compactly arranged cells overlying a basement membrane.
    • It forms the external and internal surfaces of various body parts.
    • It forms all the lining of body cavities, cover all body surface, and are the major tissue in glands.
    • Hence, the correct answer is Epithelial.


  • Question 7
    1 / -0
    Ligaments and tendons are
    Solution
    A tendon is a fibrous connective tissue, which attaches muscle to the bone. The ligament is a fibrous connective tissue, which attaches bone to bone and usually serves to hold structures together and keep them stable.
    So, the correct answer is option B.
  • Question 8
    1 / -0
    The contraction of which muscle is involuntary, vigorous and rhythmic?
    Solution
    Cardiac muscles are the muscles of the heart. They are self-contracting, autonomically regulated (meaning involuntary) and must continue to contract in a rhythmic fashion for the whole life of the organism.
    Thus, the correct answer is option (B), 'Cardiac muscles'.
  • Question 9
    1 / -0
    Most abundant cells of areolar tissue are:
    Solution

    Areolar connective tissue is a soft tissue surrounding the blood vessels and nerves and forming the layer that flexibly attaches the skin to the muscles. Fibroblasts are the most abundant and common cells in areolar connective tissue.

    So, the correct answer is option A.

  • Question 10
    1 / -0
    High contents of myoglobin and cytochromes are present in
    Solution
    Red muscle exhibits a fused contraction at a slower frequency of stimulation. The red color of muscles is due partly to myoglobin, which is probably freely dissolved in the sarcoplasm and partly to the cytochrome, which are mainly associated with the particulate components of the cytoplasm.
    Thus, the correct answer is option (A), 'Red muscles'.
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