Epithelial/connective/tissue healing
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Epithelial/connective/tissue healing

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Questions and Answers

Which of the following is a function of epithelial tissues?

  • Covers and protects other tissues
  • Filters biochemical substances
  • Provides sensory output
  • All of the above (correct)

    • Which of the following is a characteristic of epithelial tissues?

  • They are not innervated
  • They have blood vessels
  • They lack junctional complexes
  • They have apical and basal surfaces (correct)

    • Which of the following is used to classify epithelial tissues?

  • Number of layers of cells
  • Shape of cells
  • Presence of surface specialization
  • All of the above (correct)

    • Which type of epithelium lines the surface of body cavities and surfaces involving passage of gas or liquid?

    <p>Simple squamous</p> Signup and view all the answers

    Which type of epithelium is found in the renal tubular cells, exocrine gland and biliary ducts, bronchioles, and follicles in the thyroid gland?

    <p>Simple cuboidal</p> Signup and view all the answers

    Which type of epithelium is found in the stomach, gallbladder and intestines?

    <p>Simple columnar</p> Signup and view all the answers

    Which type of epithelium is found in the skin but also mucus membranes?

    <p>Stratified squamous</p> Signup and view all the answers

    Which type of epithelium is usually only two cell layers thick and lines large excretory ducts?

    <p>Stratified cuboidal</p> Signup and view all the answers

    Which type of epithelium appears stratified but is actually a simple epithelium?

    <p>Pseudostratified columnar</p> Signup and view all the answers

    Which type of epithelium lines the nasal cavity, larynx, pharynx, bronchi & trachea?

    <p>Pseudostratified columnar</p> Signup and view all the answers

    Which type of epithelium lines portions of the urinary tract where changes in volume occur?

    <p>Transitional epithelium</p> Signup and view all the answers

    What is the function of the surface layer of mucus in the respiratory tract?

    <p>To trap particles</p> Signup and view all the answers

    What is the function of the basement membrane in epithelial tissue?

    <p>To connect epithelial cells to the underlying connective tissue</p> Signup and view all the answers

    Which type of gland secretes hormones into circulation?

    <p>Endocrine gland</p> Signup and view all the answers

    What type of secretion is watery with a high concentration of enzymes?

    <p>Serous secretion</p> Signup and view all the answers

    Which type of gland has a main duct that is unbranched?

    <p>Simple gland</p> Signup and view all the answers

    What is the method of secretion for merocrine glands?

    <p>Secretion packaged in granular units &amp; released via exocytosis</p> Signup and view all the answers

    Which type of epithelial cell secretes mucin that becomes mucus when mixed with water?

    <p>Goblet cell</p> Signup and view all the answers

    What is the function of myoepithelial cells in exocrine glands?

    <p>To aid in the discharge of secretion into ducts</p> Signup and view all the answers

    Which type of secretion is composed of both serous and mucous components?

    <p>Mixed secretion</p> Signup and view all the answers

    Which type of connective tissue is responsible for providing a framework for certain organs?

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

    Which type of connective tissue is highly vascularized and functions as an energy source and thermal insulator?

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

    Which type of connective tissue has tightly packed, parallel collagen fibers and provides tensile strength in one direction?

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

    Which type of connective tissue has thicker collagen fiber bundles arranged randomly for strength in many directions?

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

    Which type of connective tissue is most rigid and commonly found in articular cartilage and trachea?

    <p>Hyaline cartilage</p> Signup and view all the answers

    Which type of connective tissue is most flexible and commonly found in the epiglottis and pinnae?

    <p>Elastic cartilage</p> Signup and view all the answers

    Which type of connective tissue lacks a perichondrium and is found in intervertebral discs, pelvis, and knee joint?

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

    Which type of connective tissue contains osteoblasts, osteoclasts, collagen, and calcium salts?

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

    Which type of connective tissue is composed of cells, proteins, and plasma?

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

    Which type of membrane lines body cavity walls and covers the outer surfaces of organs?

    <p>Serous membrane</p> Signup and view all the answers

    Which of the following is the body's first response to tissue injury?

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

    What are the clinical signs of inflammation?

    <p>Heat and redness</p> Signup and view all the answers

    What is the purpose of clot formation in the process of inflammation?

    <p>Slows bleeding and isolates bacteria</p> Signup and view all the answers

    What is the function of phagocytic cells in the process of inflammation?

    <p>Removal of debris and bacteria</p> Signup and view all the answers

    What is the term used to describe the formation of granulation tissue?

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

    What is the function of granulation tissue in wound repair?

    <p>Inhibits bacteria and promotes healing</p> Signup and view all the answers

    What happens during epithelialization in wound repair?

    <p>Epithelial cells divide to form a new tissue layer</p> Signup and view all the answers

    What is the final stage of wound repair?

    <p>Scar tissue formation</p> Signup and view all the answers

    What is the classification of wound repair based on?

    <p>Mechanism of healing and proximity of wound edges</p> Signup and view all the answers

    What is the function of scar tissue in wound repair?

    <p>Provides strength but is less flexible</p> Signup and view all the answers

    Amorphous, homogenous material, medium for nutrient/waste exchange

    <p>Ground substance</p> Signup and view all the answers

    Types of fibers

    <p>Collagenous, reticular, elastic</p> Signup and view all the answers

    What are the types of fixed cells

    <p>Fibroblasts, adipocytes, reticular cells</p> Signup and view all the answers

    Types of transient cells

    <p>Leukocytes, mast cells, macrophages</p> Signup and view all the answers

    Involved in production of reticular fibers and in the immune response

    <p>Reticular cells</p> Signup and view all the answers

    Secrete collagen and ground substance

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

    Which type of membrane produces thin, watery fluid called transudate that serves to reduce friction?

    <p>Serous membrane</p> Signup and view all the answers

    Chondroblasts are made up of

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

    What moves into tissues via diapedesis in response to infection

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

    Releases granules containing histamine and heparin to initiate an inflammatory response

    <p>Mast cells</p> Signup and view all the answers

    Phagocytosis and lysosomal digestion of microbes and cellular debris is enabled by

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

    What is the structure of the lamina propria

    <p>Either stratified squamous or simple columnar epithelial layer covering layer of loose connective tissue</p> Signup and view all the answers

    Which type of gland secretes regulatory chemicals (hormones) into circulation?

    <p>Endocrine gland</p> Signup and view all the answers

    What membrane lines mobile joint cavities and bursae, it is composed entirely of loose connective tissue and adipose covered by a layer of collagen fibers and fibroblasts, does not have an epithelial layer

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

    Study Notes

    Functions and Characteristics of Epithelial Tissues

    • Epithelial tissues serve functions like protection, absorption, secretion, sensation, and filtration.
    • Characteristics include cellularity, polarity, attachment to the basement membrane, avascularity, and regenerative capacity.
    • Classification of epithelial tissues is based on cell shape (squamous, cuboidal, columnar) and the number of layers (simple or stratified).

    Types of Epithelial Tissues

    • Simple squamous epithelium lines body cavities and surfaces involved in gas or liquid passage.
    • Simple cuboidal epithelium is found in renal tubular cells, exocrine glands, biliary ducts, bronchioles, and thyroid follicles.
    • Simple columnar epithelium is present in the stomach, gallbladder, and intestines.
    • Stratified squamous epithelium is located in the skin and mucus membranes.
    • Stratified cuboidal epithelium, usually two cell layers thick, lines large excretory ducts.
    • Pseudostratified columnar epithelium appears stratified but is actually simple.
    • Ciliated columnar epithelium lines the nasal cavity, larynx, pharynx, bronchi, and trachea.
    • Transitional epithelium lines portions of the urinary tract allowing volume change.
    • The surface layer of mucus in the respiratory tract traps pathogens and facilitates their removal.
    • The basement membrane provides support and acts as a selective barrier.

    Glandular Epithelium

    • Endocrine glands secrete hormones directly into circulation.
    • Serous secretion is watery and enzyme-rich.
    • Exocrine glands with unbranched main ducts are classified as simple.
    • Merocrine glands secrete via exocytosis.
    • Goblet cells secrete mucin, which becomes mucus upon hydration.
    • Myoepithelial cells assist in the expulsion of secretions from exocrine glands.
    • Mixed secretion comprises both serous and mucous components.

    Connective Tissues

    • Reticular connective tissue provides a framework for certain organs.
    • Adipose tissue is highly vascularized, serving as an energy source and thermal insulator.
    • Dense regular connective tissue has parallel collagen fibers offering tensile strength.
    • Dense irregular connective tissue features randomly arranged collagen fibers for multidirectional strength.
    • Hyaline cartilage is the most rigid type, found in articular cartilage and trachea.
    • Elastic cartilage is the most flexible, present in the epiglottis and pinnae.
    • Fibrocartilage lacks a perichondrium and is found in intervertebral discs and knee joints.
    • Bone contains osteoblasts, osteoclasts, collagen, and calcium salts.
    • Blood is fluid connective tissue composed of cells, proteins, and plasma.

    Membranes and Inflammation

    • Serous membranes line body cavity walls and cover organ surfaces.
    • The body’s initial response to tissue injury involves inflammation.
    • Clinical signs of inflammation include redness, heat, swelling, and pain.
    • Clot formation serves to halt bleeding and create a matrix for healing.
    • Phagocytic cells remove debris and pathogens during inflammation.
    • Granulation tissue formation is a term describing new connective tissue during healing.
    • Granulation tissue promotes wound repair by providing a scaffold for new cells during healing.
    • Epithelialization involves regenerating epithelial cells to cover a wound.
    • The final stage of wound repair is scarring, which stabilizes the repaired skin.
    • Wound repair classification is based on the nature and extent of injury.
    • Scar tissue provides strength but lacks elasticity compared to normal tissue.

    Additional Notes

    • Amorphous, homogeneous material in connective tissue facilitates nutrient and waste exchange.
    • Fixed cells include fibroblasts, adipocytes, and macrophages; transient cells include lymphocytes and neutrophils.
    • Reticular fibers are produced by fibroblasts and assist in immune response.
    • Synovial membranes produce transudate to reduce friction in joint cavities and bursae.

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    Description

    Test your knowledge on epithelial tissue with this quiz! Learn about the functions, structure, and characteristics of epithelial tissues, as well as how to classify and identify different types. Explore where each type of epithelium is found in the body and deepen your understanding of this important tissue.

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