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Tissues Test - 70

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Tissues Test - 70
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  • Question 1
    1 / -0
    Heart muscles are --------.
    Solution
    Correct answer: C
    Explanation: 
    • The main tissue of the heart's walls is cardiac muscle, or myocardium.
    • It is a striated tissue consisting of sarcomeres. 
    • Cardiac muscles are unconsciously controlled (involuntary) and continue to function even when they are not stimulated by a nerve impulse. 
    Hence, cardiac muscles are involuntary and striated. 

  • Question 2
    1 / -0
    Nissl granules found in cyton of a neuron and having affinity for basic dyes are composed of _________.
    Solution
    The correct option is B
    A Nissl body, also known as Nissl substance and Nissl material, is a large granular body found in neurons. These granules are of rough endoplasmic reticulum (RER) with rosettes of free ribosomes, and are the site of protein synthesis. It contains RNA which are translated into proteins.
  • Question 3
    1 / -0
    Striated and voluntary muscles occur in ____________.
    Solution
    Correct answer (D) Limbs
    Skeletal muscles are striated and voluntary muscle that play an integral role in the formation of the structural framework of the body. It is the only muscle tissue under the direct conscious control of the cerebral cortex of the brain and hence is the voluntary muscle. All conscious movements of the body,including movement of limbs are the result of the contraction of these muscles.
  • Question 4
    1 / -0
    Heart muscles are ____________.
    Solution
    Correct answer (D)cardiac
    Cardiac muscle (also called heart muscle or myocardium) is one of the three types of vertebrate muscles, the other two being skeletal and smooth muscles.It is an involuntary,striated muscle that constitutes the main tissue of the walls of the heart.
  • Question 5
    1 / -0
    Large irregular ovoid cells found in areolar tissue are
    Solution
    A. Fibroblasts are a type of biological cells. These cells synthesise extracellular matrix and collagen and form the structural framework of animal tissues.
    B. Macrophages are a kind of white blood cells that are phagocytic and engulfs foreign particles, pathogens, cellular debris etc. in the blood.
    C. Mast cells are a kind of white blood cells which are oval or round. These have granular cytoplasm. These cells are associated with allergic reactions.
    D. Chromatophores are the pigment containing cells that reflect light and hence, produce colour.
    So, the correct answer is 'Mast cells'. 
  • Question 6
    1 / -0
    Striated muscles are ______________.
    Solution
    Striated muscles have distinctive features of repeating functional units. These striated muscles are syncytial (i.e. one cell having multiple nuclei), multinucleate, and with a large number of sarcomeres which are the functional unit of a striated muscle. Hence the correct answer is D.

  • Question 7
    1 / -0
    Cells of simple squamous epithelium are _____________.
    Solution
    The simple squamous epithelium consists of a single layer of flat and plate-like cells which is permeable in nature and enables filtration and diffusion of small molecules. They form a part of delicate linings of blood vessels, alveoli, etc. 
    Hence, the correct answer is C.

  • Question 8
    1 / -0
    Lymph differs from blood in possessing _______________.
    Solution
    Lymph is a colourless liquid found mostly in the inter-cellular spaces of a tissue. Lymph consists of WBC's and watery fluid. It differs from the blood in lacking red blood cells and some blood proteins. The correct answer is option A.
  • Question 9
    1 / -0
    Nodes of Ranvier occur in ____________.
    Solution
    The correct option is D.
    Nodes of ranvier only occur in nerve fibres consisting of myelin sheath. The myelinated nerve fibres have myelin sheath and therefore nodes of ranvier occur in the same.
  • Question 10
    1 / -0
    Nissl's granules are made of ______________.
    Solution
    The correct option is A.
    Nissl's granules (or Nissl's bodies) are the groups of ribosomes and rough endoplasmic reticulum. These are actively involved in the synthesis of proteins.
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