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Tissues Test - 92

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Tissues Test - 92
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Which one of the following mammalian cells is not capable of metabolizing glucose to carbon dioxide aerobically ?

    Solution
    RBCs of mammalian cells at maturity lose all the organelles and the space is replaced by haemoglobin. So it does not contain mitochondria and the oxidative enzymes of mitochondria to carry out the Krebs cycle. It instead uses EMP and hexose monophosphate shunt to anaerobically breakdown glucose to release ATP
    So, the correct answer is 'Red blood cells'
  • Question 2
    1 / -0
    The epidermis and rootcap are produced by
    Solution
    The epidermis and root cap are produced by dermatogen. The protoderm forms periblem, plerom, and dermatogen.
    Thus, the correct answer is option A.

  • Question 3
    1 / -0
    The myelin sheath provides ......... to the axon.
    Solution
    The myelin sheath of a neuron consists of fat-containing cells that insulate the axon from electrical activity. This insulation helps to increase the rate of transmission of signals. Myelin is made up of inter-twining hydrocarbon chains of sphingomyelin, which serve to strengthen the myelin sheath. Hence it also provides mechanical support to the neuron.
    Thus the correct option is C.
  • Question 4
    1 / -0
    Striated muscles are found as fasciculi, which are surrounded by
    Solution
    Skeletal muscles are usually attached to bone by tendons that are composed of connective tissue. This connective tissue also ensheaths the entire muscle and is called as epimysium. Skeletal muscles contain numerous subunits or bundles called fascicles (or fascicles). These fascicles are also surrounded by connective tissue (called the as perimysium) and each fascicle is composed of numerous muscle fibers (or muscle cells).
    Thus, the correct answer is option A.
  • Question 5
    1 / -0
    Which one of the following muscles is responsible for moving and shaking the skin?
    Solution
    The panniculus carnosus is a sheath of dermal (skin) muscle, developed in many mammals, that allows the movement of the skin independent of the movement of deeper muscle masses. In humans, the platysma muscle of the neck, palmaris brevis in the hand and the dartos muscle in the scrotum are described as a discrete muscle of the panniculus carnosus. 
    Hence the correct option is C.
  • Question 6
    1 / -0
    A man was infested with germs and was taken to the hospital. On pathological tests, it was found that he had 
    a. A low number of RBC
    b. A high number of WBC and a low number of RBC
    c. A low number of WBC
    d. A high number of platelets 
    Which of the following alternative is correct?
    Solution
    White blood cells (WBCs) are cells of the immune system involved in defending the body against both infectious diseases and foreign materials. Therefore, an abnormally high of WBC may agree with the suspicion that an infection is present and the doctor will order further tests. 
    An abnormally low level of RBC may signal to the physician that the patient may be suffering from anemia, which might have caused by any intestinal worm infestation, like Hookworm.
    Although total WBC count falls in viral infections, viruses are not considered as germs, which have infected the subject (man).
    Bacterial or viral infections are the most common causes of a high white blood cell count. The increase in white blood cells due to infection is caused by a normal response of the immune system triggering the bone marrow to release additional stored white blood cells into the blood to fight off the disease. Low level of RBC may result in reduced immunity.
    Hence A is the correct option.
  • Question 7
    1 / -0
    The RBCs of the camel are:
    Solution
    The red blood cells of camel are oval-shaped and they also have a nucleus in them, unlike in other mammals, where the RBCs are circular and enucleated. The oval shape helps to facilitate their flow in a dehydrated state. These cells are also more stable in order to withstand high osmotic variation without rupturing when drinking large amounts of water. Thus, the correct answer is option D.
  • Question 8
    1 / -0
    Helper T-lymphocytes are characterised to release ................. 
    Solution
    Cytokines are secreted by helper T-cells in response to stimulation by antigens and acts on other cells of the immune system, thereby activating them. Serotonin and histamines are produced by mast cells whereas pyrogens are endotoxins.
    Thus, the correct answer is option (D).
  • Question 9
    1 / -0
    Eleidin proteins are found in the layer of mammalian skin, stratum
    Solution
    Eleidin is a clear intracellular protein, which is present in the stratum lucidum of the skin. Eleidin is a transformation product of the amino acid complex keratohyalin.
    Thus, the correct answer is option (B), 'Lucidum'.
  • Question 10
    1 / -0
    How many tissue systems are suggested by Sachs?
    Solution
    Two or more tissues together constitutes the tissue system. The activities of the constituent tissues are responsible for the major functioning, although they are different in structure and origin. All the different type of tissues in a plant that perform the similar basic function, irrespective of their location is known as tissue system. 
    Sachs (1875), recognized three types of tissue system in plants: 
    1. Epidermal or Dermal Tissue System 
    2. Cortical or Fundamental or Ground Tissue System. 
    3. Vascular Tissue System. 
    So, the correct answer is 'Three'

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