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Tissues Test - 51

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Tissues Test - 51
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  • Question 1
    1 / -0
    The Nissl granules of nerve cells are made up of 
    Solution
    A Nissl granule is a large granular body found in neurons. These granules are rough endoplasmic reticulum (RER) with rosettes of free ribosomes and are the site of protein synthesis.
    Hence the correct option is A.
  • Question 2
    1 / -0
    Hb count is done by
    Solution
    There are four methods for the determination of hemoglobin, Hb in the blood.
    1. Sahli's method
    2. Cyanmet Hb method
    3. Hemoglobinometer
    4. Haden Hausser method
    Therefore, the correct answer is option D.
  • Question 3
    1 / -0
    'Nodes of Ranvier' are found in 
    Solution
    Nodes of Ranvier are periodic gaps in the insulating sheath (myelin) on the axon of certain neurons, that serves to facilitate the rapid conduction of nerve impulses. 
    The action potential propagated by one node of Ranvier jumps to and is regenerated at the next node along the axon, thereby enabling the action potential to travel rapidly along the fiber. This mode of conduction of impulses is called saltatory conduction.
    Hence the correct option is C.
  • Question 4
    1 / -0
    Dermis of mammalian skin is mainly composed of:
    Solution
    Dermis or corium is the inner part of the skin mainly composed of connective tissue. It is mesodermal in origin. The dermis is derived embryologically from dermatome. The dermis is 2 to 3 times thicker than the epidermis.
    Hence the correct option is B.
  • Question 5
    1 / -0
    Which of the following counts is incorrect?
    Solution
    Normal RBC count 4.2 - 5.7 million cells per cubic mm.
    Normal WBC count is 4,500 - 5000 cells per cubic mm.
    Normal ESR range is 0-22 mm/hr.
    Normal platelet count is 150,000-450,000 per cubic mm.
    Therefore, the correct answer is option A.
  • Question 6
    1 / -0
    Shivering in winter is caused by
    Solution
    Shivering is an involuntary action of striated muscles ( skeletal muscles). Shivering is also called rigor or shuddering. It is a bodily function in response to early hypothermia or just feeling cold in warm-blooded animals. When the core body temperature drops, the shivering reflex is triggered to maintain homeostasis. Skeletal muscles begin to shake in small movements, creating warmth by expending energy. 
    Hence the correct option is C.
  • Question 7
    1 / -0
    Myelin sheath is present over:
    Solution
    Schwann cells also called as neurolemmocytes are the principal glia of the peripheral nervous system (PNS). 
    Myelinating Schwann cells wrap around axons of motor and sensory neurons to form the myelin sheath. 
    Hence, the correct answer is option B.
  • Question 8
    1 / -0
    Scaly bark occurs in
    Solution
    Scaly bark refers to the type of bark of trees where the stem has discontinuous, overlapping successive periderms and patches of the bark are shed. This is generally found in Eucalyptus squamosa growing in and around Sydney.
    So, the correct answer is option A.
  • Question 9
    1 / -0
    Innermost layer of cortex is
    Solution
    • Epidermis is the outermost covering of the primary plant body and is mostly represented by a single layer of compactly arranged, barrel-shaped parenchyma cells that delimit cotex on outer side.  
    • The inner most layer of cortex is the endodermis, which has compactly arranged barrel shaped cells. 
    • The outer suberized sub-epidermal layer of cortex is exodermis and it has unthickened passage cells and is mostly present in roots. 
    • Hypodermis refers to 5-7 layers of cortical cells present just beneath the epidermis. It is present in leaves not in roots.

    So, the correct answer is option A.
  • Question 10
    1 / -0
    Total number of bones in human is
    Solution
    The endoskeleton in mammals is divided into two parts- axial and appendicular. The axial skeleton lies along the longitudinal axis of the body and includes skull, vertebral column, ribs and sternum. Total number of bones in human is 206.
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