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Locomotion and Movement Test - 26

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Locomotion and Movement Test - 26
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  • Question 1
    1 / -0
    Deposition of ______ in the joints causes gout.
    Solution
    Gout is a disorder in which deposits of uric acid crystals accumulate in the joints because of high levels of uric acid in the blood (hyperuricemia). The accumulations of crystals cause flare-ups (attacks) of painful inflammation in and around joints.
    Hence, the correct answer is option B.
  • Question 2
    1 / -0
    Choose the word that is different from the others in the following and give reason.
    Solution
    • A joint or articulation (or articular surface) is the connection made between bones in the body which link the skeletal system into a functional whole. They are constructed to allow for different degrees and types of movement.
    • Ball and socket joint is a type of freely movable joint. For example, shoulder and hip joints.
    • Ball and socket are different from the others in the following because ball and socket is a type of joint which is an articulation between two or more bones whereas the clavicle, skull, and femur are individual bones present in the body.
    • So, the correct answer is 'Ball and socket'.
  • Question 3
    1 / -0
    Fundamental repeating unit of skeletal myofibrils is
    Solution
    Fundamental repeating unit of skeletal myofibrils is sarcomere. It is the repeating unit between 2 Z lines. It is bordered between Z lines. This sarcomere gives striated appearance to the skeletal muscle. 
    Thus, the correct answer is 'Sarcomere.'

  • Question 4
    1 / -0
    Half of pelvic girdle is known as 
    Solution
    Os Innominatum is a large irregular bone that forms the bony pelvis. Os-innominatum is also called as hip bone. Each pelvic girdle is made of a pair of hip bones which are identical with each other and each made of pubis, ilium and ischium. So, the correct answer is 'os innominatum'.
  • Question 5
    1 / -0
    An animal cell with numerous nuclei is called
    Solution
    • Syncytial refers to a multinucleate condition where a single cell has more than one nucleus per cell i.e., multiple nuclei with a common cytoplasm.
    • It is caused primarily due to multiple cell fusions of uninuclear cells.
    • This condition usually arises when cells are infected with certain types of viruses (HIV, pneumoviruses etc.).
    • In animals, this condition is seen in skeletal muscles (large skeletal muscle fibres are formed by the fusion of individual muscle cells).
    • So, the correct answer is 'Syncytial'.
  • Question 6
    1 / -0
    Two halves of pectoral girdle fuse in
    Solution
    •  A pectoral girdle or shoulder girdle attach the bones of upper limb to the axial skeleton.
    • Each pectoral girdle is formed of two halves. Each half of pectoral girdle consists of a scapula and clavicle. The Scapula articulates with the clavicle and Humerus. The clavicles or collar's bones are slender, doubly curved long bones, which articulate with the sternum.
    • Two halves of pectoral girdle (left and right half) fuse in mid-ventral line.
    • So, the correct answer is 'Mid ventral line'.
  • Question 7
    1 / -0
    Each half of pelvic girdle is made up of 
    Solution
    • Pelvic girdle consists of two coxal bones. Each coxal bone is formed by the fusion of three bones i.e each half of pelvic girdle is made up of ilium, ischium, and pubis.
    •  At the point of fusion of the ilium, ischium and pubis bones there is a cavity called acetabulum to which the thigh bone(femur) articulates. 
    • Hence each half of pelvic girdle is made up of Ilium, ischium, and pubis.
    • So, the correct answer is 'All of the above'.
  • Question 8
    1 / -0
    Identify the joints, which are freely movable.
    Solution
    A synovial joint is a connection between two bones consisting of a cartilage lined cavity filled with fluid. Synovial joints are capable of the greatest movement. Knees, elbows and shoulders are examples of synovial joints. Since they allow for free movement, synovial joints are classified as diarthrosis. They allow for many types of movement including gliding, angular, rotational etc. So, the correct answer is 'Synovial joints'.
  • Question 9
    1 / -0
    Clavicle is a constituent of
    Solution
    The clavicle is the constituent of pectoral griddle or shoulder gridle. It is called as collar bone which serves as a rigid support from which the scapula and free limb suspended. It is an arrangement that keeps the upper limb away from the thorax so that the arm has maximum range of movement. So, the correct answer is 'pectoral gridle'.
  • Question 10
    1 / -0
    $${Ca}^{2+}$$ and $${Mg}^{2+}$$ ions 
    Solution

    High calcium and magnesium ion concentration decrease the excitability of the muscle fiber membrane by raising the threshold to stimulation, while a low level of the calcium and magnesium ions increase the excitability of muscles fibers. 
    So, the correct answer is A.
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