MSS_Exam 1

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arriez04
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100423
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MSS_Exam 1
Updated:
2011-09-08 00:14:43
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MSS Exam
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MSS - Exam 1
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  1. Four basic tissues in body
    • 1. Epithelial
    • 2. Connective
    • 3. Muscle
    • 4. Nervouse
  2. Describe epithelial tisse and its classification.
    Epithelial tissue = closely apposed cells with very little intercellular substances between them; arranged in sheets to either cover or line surfaces of the body or to form glands.

    Classification by shape and nubmer of cell layers
  3. Describe EPITHELIAL TISSUE'S:
    - Cellularity
    - Special contact
    - Polarity
    - Support by c.t.
    - Avasular but innnervated
    - Regenerative
    • Cellularity: composed almost entirely of cells
    • Special contact: form continuous sheets held together by tight junctions and desmosomes
    • Polarity: apical and basal surfaces
    • Supported by c.t.: reticualr and basal laminae
    • Avasular but innnervated: no blood vessels but supplied by nerve fibers
    • Regenerative: rapidly replaces lost cells by cell division
  4. Describe epithelial tissue classification of shape.
    • 1. Squamous: flat cell, width greater than height
    • 2. Cuboidal: cube shape
    • 3. Columnar: column shape, height greater tahn width
  5. Desribe the differnt types of simple epithelial tissues.
    • 1. Simple squamous: single layer of flat cells with disc-shpaed central nuclei and sparse cytoplasm
    • 2. Simple cuboidal: single layer of cubelike cells with large, spherical central nuclei
    • 3. Simple columnar: single layer of tall cells with routh to oval nuclei; some cells bear cilia; layer may contain goblet cells (mucus-secreting unicellular glands)
  6. Fucntion / location of epithelial simple squamous tissue
    • FUNCTION:
    • - passage of material by diffusion and filtration in sites where protection is not important
    • - secretes lubricating substances in serosae

    • LOCATION:
    • - kidney glomeruli
    • - air sacs of lungs
    • - lining of heart
    • - blood vessels
    • - lymphatic vessels
    • - lining of vetnral body cavity (serosae)
  7. Fucntion / location of epithelial simple cuboidal tissue
    FUNCTION: secretion and absoprtion

    • LOCATION:
    • - kidney tubule
    • - ducts and secretory portion of small glands
    • - ovary surfaces
  8. SIMPLE CUBOIDAL
  9. SIMPLE SQUAMOUS ENDOTHELIAL CELLS (line blood vessels)
  10. Function / location of simple columnar epithelial tissue
    FUNCTION: absorption and secretion mucus, enzymes, and other substances

    • LOCATION:
    • Ciliated: help move substances through internal passageways
    • - small bronchi
    • - uterine tubes
    • - some regions of uterus

    • Non-ciliated:
    • - digestive tract
    • - gallbladder
    • - excretory ducts of some glands
  11. SIMPLE COLUMNAR EPITHELIAL LAYER
  12. Describe stratified squamous epithelium

    Function / Location?
    • DESCRIPTION:
    • - thick membrane composed of several layers
    • - basal cells are cuboidal or columnar and metabolically active
    • - surface cells are squamous

    FUNCTION: protects underlying tissues in areas subjected to abrasion

    • LOCATION:
    • Non-keratinized: lines the following
    • - esophagus
    • - mouth
    • - vagina
    • Keratinized:
    • - skin (dry membrane)
  13. Describe stratified cuboidal epithelial tissue.

    Function / Location?
    • DESCRIPTION:
    • - typically two cell layers thick (both cuboidal)

    FUNCTION: secretion and absoption

    • LOCATION:
    • - sweat glands
    • - mammary glands
  14. Describe stratified columnar epithelial tissue.

    Function / Location?
    DESCRIPTION: multiple layer usally with cuboidal at basal layer

    FUNCTION: protection and secretion

    • LOCATION:
    • - pharynx
    • - male urethra
    • - lining some glandular ducts
  15. Describe pseudostratified columnar epithelial cells.

    Fuction / Location?
    DESCRIPTION: single layer of columnar cells (often ciliated) of differing heights; appears stratified and multinucliated; all cells touch basal lamina but not all cells reach apical cell surface

    FUNCTION: secretion and propulsion of mucus

    • LOCATON:
    • - male sperm carrying ducts (non-ciliated)
    • - trachea (ciliated)
  16. Describe stratified transitional epithelial cells.

    Function / Location?
    DESCRIPTION: true stratified layer; basal cells cuboidal or columnar; most apical cell appears to be in "transition"; apical cells may contain double nuclei

    FUNCTION: stretching and protection

    • LOCATION: lines following:
    • - urinary bladder
    • - ureter
    • - part of urethra
  17. Define:
    - Neoplasm
    - Benign
    - Malignant
    - Carcinoma
    - Adenocarcinoma
    - Metastasis
    • - Neoplasm: new growth
    • - Benign: nonmalignant neoplasm
    • - Malignant: uncontrollable growth and dissemination or recurrence after removal
    • - Carcinoma: malignant neoplsam derived from epithelial tissue
    • - Adenocarcinoma: malignant neoplams of epithelial cells in glandular or gland-like pattern
    • - Metastasis: appearance of neoplasms in parts of the body remote from the sites of the primary tumor

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