Platelets: Formation and Functions
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Questions and Answers

What is the term for a decrease in platelet count?

  • Plateletosis
  • Thrombocytosis
  • Megakaryopenia
  • Thrombocytopenia (correct)

    • Where are 30% of the platelets released from the bone marrow found?

  • Kidneys
  • Lungs
  • Liver
  • Spleen (correct)

    • What is the lifespan of platelets?

  • About 30 days
  • About 10 days (correct)
  • About 20 days
  • About 5 days

    • Which factor released from platelets inhibits the action of heparin to help blood coagulation?

    <p>Platelet factor 4 (PF4) (A)</p> Signup and view all the answers

    What causes local vasoconstriction immediately after injury?

    <p>Serotonin and thromboxan A2 from platelets (D)</p> Signup and view all the answers

    Who is known as the Father of microbiology?

    <p>Louis Pasteur (B)</p> Signup and view all the answers

    Which type of pathogens cause harm to the host as part of their normal life cycle?

    <p>Primary pathogens (C)</p> Signup and view all the answers

    What is the main function of Glycocalyx in bacteria?

    <p>Protect a cell against dehydration (A)</p> Signup and view all the answers

    What distinguishes a prokaryotic cell from a eukaryotic cell?

    <p>Presence of membrane-bound nucleus (D)</p> Signup and view all the answers

    What did Alexander Fleming discover in 1928?

    <p>Penicillin (B)</p> Signup and view all the answers

    Where can bacteria inhabit based on the provided information?

    <p>Air, soil, water, plant and animal surfaces and tissues (A)</p> Signup and view all the answers

    What is the function of flagella in bacteria?

    <p>Movement toward or away from a particular stimulus (C)</p> Signup and view all the answers

    Which part of the flagellum functions like a rotary engine generating a propeller force?

    <p>The basal body (B)</p> Signup and view all the answers

    What is the function of fimbriae in bacteria?

    <p>Attachment of bacteria cells to specific surfaces (D)</p> Signup and view all the answers

    What is the primary function of the cell wall in bacteria?

    <p>Protection and shape maintenance (D)</p> Signup and view all the answers

    Which type of bacteria has an outer membrane rich in lipids containing lipopolysaccharides (LPS)?

    <p>Gram-negative (D)</p> Signup and view all the answers

    What are porins in Gram-negative bacteria responsible for?

    <p>Regulation of ion passage (C)</p> Signup and view all the answers

    What is the composition of the ribosome in bacteria?

    <p>RNA (rRNA) and proteins (D)</p> Signup and view all the answers

    What is the function of metachromatic or Volutin granules in bacteria?

    <p>Energy production and storage (A)</p> Signup and view all the answers

    What is the function of magnetosomes in bacteria?

    <p>Facilitate movement toward or away from a particular stimulus (B)</p> Signup and view all the answers

    Where is the nucleoid located in a bacterial cell?

    <p>In the cytoplasm (D)</p> Signup and view all the answers

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