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Questions and Answers

What is the main function of plasma cells?

  • Synthesis of fibers and amarfnogo substances
  • Produce immunoglobulin (correct)
  • Phagocytosis
  • Production of hormones
  • In which stage of erythrogenesis does the nucleus get out of the cell?

  • Oxyphilic normotsit (correct)
  • Polychromatic normotsit
  • Erythroblast
  • Basophilic normotsit
  • Which cells produce heparin and histamine?

  • Adipocytes
  • Fibroblasts
  • Macrophages
  • Mast cells (correct)
  • What is the main cellular element of loose irregular connective tissue?

    <p>Fibroblasts, macrophages</p> Signup and view all the answers

    In which type of tissue is the function of tendons executed?

    <p>Dense connective tissue</p> Signup and view all the answers

    At which stage of granulocytopoiesis do cells lose their ability to reproduce?

    <p>Metamielotsit</p> Signup and view all the answers

    What is the location of the macrophage in erythropoietic island?

    <p>In the center</p> Signup and view all the answers

    What is well developed in mature fibroblasts?

    <p>Granular endoplasmic reticulum</p> Signup and view all the answers

    What is the main function of neutrophils?

    <p>Phagocytosis</p> Signup and view all the answers

    What is the percentage of neutrophils in the leukocyte formula?

    <p>65-75%</p> Signup and view all the answers

    What is the main respiratory pigment of red blood cells?

    <p>Hemoglobin</p> Signup and view all the answers

    What is the function of eosinophils in allergy?

    <p>Destruction of histamine and anaphylotoxins</p> Signup and view all the answers

    What is the characteristic of basophilic granulocytes?

    <p>Presence of heparin and histamine</p> Signup and view all the answers

    What is the main source of human T-lymphocytes?

    <p>Thymus</p> Signup and view all the answers

    What is the percentage of lymphocytes in the leukocyte formula?

    <p>20-35%</p> Signup and view all the answers

    What are gemoreticulocytes?

    <p>Young red blood cells</p> Signup and view all the answers

    During anaphase of mitosis, chromosomes:

    <p>move to the opposite poles of the cell</p> Signup and view all the answers

    What is the number of chromosomes in human somatic cells?

    <p>46</p> Signup and view all the answers

    Which of the following is NOT characteristic of epithelial tissues?

    <p>presence of blood vessels</p> Signup and view all the answers

    What type of collagen is found in the basement membrane of epithelial tissues?

    <p>type IV collagen</p> Signup and view all the answers

    What type of epithelium is the mesothelium lining the serous membranes?

    <p>mono-layer</p> Signup and view all the answers

    What is the structure of the mucociliary airway?

    <p>pseuodostratified</p> Signup and view all the answers

    What is the average life span of red blood cells?

    <p>120 days</p> Signup and view all the answers

    What type of blood cells can migrate from the bloodstream into the connective tissue and differentiate into macrophages?

    <p>monocytes</p> Signup and view all the answers

    Study Notes

    Lymphatic Vessels

    • The endothelium of lymphatic vessels, along with elastic membrane, myocytes, and connective plate, forms a valve.

    Hemoglobin Synthesis

    • Iron for hemoglobin synthesis in erythroblasts comes from macrophages.

    Connective Tissue

    • The main cellular elements of loose irregular connective tissue are fibroblasts and macrophages.
    • Dense connective tissue is found in tendons.

    Fibroblasts

    • In mature fibroblasts, granular endoplasmic reticulum is well-developed.

    Plasma Cells

    • The main function of plasma cells is to produce immunoglobulin.

    Mast Cells

    • Mast cells produce heparin and histamine.

    Blood-Thymic Barrier

    • The blood-thymic barrier is formed by the endothelium, basement membrane, and retikuloepitelial cells.

    Erythropoietic Island

    • In the center of an erythropoietic island, a macrophage is located.

    Erythrogenesis

    • At the oxyphilic normoblast stage, the nucleus is expelled from the cell.

    Granulocytopoiesis

    • At the metamielocyte stage, cells lose their ability to reproduce.

    Mitosis

    • During anaphase of mitosis, chromosomes move to the opposite poles of the cell.

    Somatic Cells

    • Human somatic cells have 46 chromosomes.

    Epithelial Tissues

    • Epithelial tissues do not have blood vessels.
    • The basement membrane of epithelial tissues contains type IV collagen.

    Mesothelium

    • Mesothelium is a mono-layer epithelium that lines serous membranes.

    Airway Epithelium

    • Mucociliary airway epithelium is pseudostratified.

    Ciliated Epithelium

    • Goblet cells are ciliated epithelium cells that secrete mucus.

    Stratified Epithelium

    • Transitional epithelium is a type of stratified epithelium.

    Platelets

    • Nuclear-free fragments of megakaryocyte cytoplasm are platelets.

    Red Blood Cells

    • The average life span of red blood cells is 120 days.

    Monocytes

    • Monocytes are blood cells that migrate into connective tissue and differentiate into macrophages.

    Lymphocytes

    • Lymphocyte cytoplasm is basophilic.

    Antibodies

    • Antibodies are isolated from the globulin fraction of plasma proteins.

    Connective Tissue

    • All types of connective tissue develop from mesenchyme.

    Gemoreticulocytes

    • Gemoreticulocytes are young red blood cells.

    Neutrophils

    • Azurophilic granules of neutrophils contain myeloperoxidase.

    Macrophages

    • Monocytes turn into macrophages in tissues.

    Red Blood Cells

    • The primary function of red blood cells is to transport O2 and CO2.

    Intercellular Substance

    • Rich connective tissue is rich in intercellular substance.

    Hemoglobin

    • Hemoglobin is the main respiratory pigment of red blood cells.

    Neutrophils

    • Neutrophils make up 65-75% of the leukocyte formula.
    • The main function of neutrophils is phagocytosis.

    Eosinophils

    • Eosinophils make up 2-5% of the leukocyte formula.
    • Eosinophils participate in allergy mainly by destroying histamine and anaphylaxis.

    Basophils

    • Basophils make up 0.5-1% of the leukocyte formula.
    • Basophilic granulocytes contain heparin and histamine.

    Lymphocytes

    • Lymphocytes make up 20-35% of the leukocyte formula.
    • The major source of human T-lymphocytes is the thymus.

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