HISTOLOGY: PRACTICE 3

SINGLE BEST OPTION SERIES

         INSTRUCTION: SELECT THE SINGLE BEST OPTION

1.        Which of the following is incorrect about the staining of connective tissue fibres in the body?
   a.       Reticular fibres are argyrophilic because their glycoproteins can reduce silver salts to sliver metals
   b.      Verhoeff’s stain is best used to demonstrate collagen fibres
   c.       Elastic fibres stain heavily with orcein dye
   d.      Weigert’s stain selectively reveals elastic fibres
   e.      None of the above
   2.       The amphipathic constituents of cell membrane include the following except:
   a.       Transmembrane proteins
   b.      Phospholipid fatty acids
   c.       Glycolipids
   d.      Cholesterol
   e.      None of the above
   3.       Which of the following is incorrect about pseudostratified epithelia?
   a.       Some of the cells are columnar and some are cuboidal
   b.      Lines the nasal cavity, trachea and bronchi
   c.       They have cilia which help to transport particles trapped in mucus
   d.      The constituent cells are in more than one layer
   e.      All cells are attached to the basement membrane
   4.       Connective tissue is formed by the following components except:
   a.       Cells
   b.      Fibres
   c.       Ground substance
   d.      All of the above
   e.      None of the above
   5.       Which of the following is incorrect?
   a.       Kupffer cells are macrophages in the kidneys
   b.      Microglial cells are macrophages in the central nervous system
   c.       Langerhans cells are macrophages in the skin
   d.      Macrohpages in the bone tissue are called osteoclast
   e.      Dendritic cells are found in lymph nodes
   6.       Which of the following is incorrect about “embedding” of tissues for histological examination?
   a.       Embedding substances impart a rigid consistency to the tissues
   b.      Paraffin is the embedding material routinely used for tissues to be examined by electron microscope
   c.       Resins are used for embedding tissues to be examined by both light and electron microscopy
   d.      In paraffin embedding, the solvent used is usually xylene
   e.      None of the above
   7.       Which of the following is incorrect about electron microscopy?
   a.       The transmission electron microscope functions on the principle that a beam of electron can be deflected by electromagnetic fields
   b.      In electron microscope, electrons are released by heating tungsten filament in a vacuum
   c.       To provide a good interaction between specimens and electrons, electron microscopy require very thick section
   d.      Scanning electron microscopy permits pseudo-three-dimensional views of the surface of cells, tissues and organs
   e.      Unlike the electrons in the transmission electron microscope, those in the scanning electron microscope do not pass through the specimen
   8.       The plasma membrane of cells has the following functions except:
   a.       It is a selectively permeable barrier surrounding the cell
   b.      It is a site for hormone receptors
   c.       It is a cell adhesion interphase
   d.      It facilitates the transport of sugars
   e.      It is the primary protein synthesis site
   9.       Stratified squamous epithelium is found on the:
   a.       Pericardium
   b.      Bladder, ureters and renal calyces
   c.       Epidermis of the skin
   d.      Conjunctiva
   e.      Developing ovarian follicles
   10.   The extracellular matrices of connective tissues usually consist of the following except:
   a.       Collagen
   b.      Reticular fibres
   c.       Ground substance
   d.      Elastic fibres
   e.      None of the above
   
   
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