Histology-Fall11 Epithelium/Glands

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Author:
catorresdiaz
ID:
99737
Filename:
Histology-Fall11 Epithelium/Glands
Updated:
2011-09-04 16:58:44
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histology lab epithelium glands
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Histology-Fall11 Epithelium/Glands
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  1. PROPHASE

    Characteristics:
    Chromosomes become visible and appear as threadlike structures; disappearance of nuclear envelope towards the end of prophase.

    Location: Eukaryotic cell.
  2. METAPHASE

    Characteristics:
    Formation of mitotic spindle and alignment of chromosomes along the equatorial plate.

    Location: Eukaryotic cell.
  3. ANAPHASE

    Characteristics:
    Separation of chromatids at the centromere; movement of daughter chromosomes toward opposite poles.

    Location: Eukaryotic cell.
  4. TELOPHASE

    Characteristics:
    Reformation of the nuclear envelope from discontinuous portions of ER; karyokinesis.

    Location: Eukaryotic cell.
  5. SIMPLE SQUAMOUS EPITHELIUM

    Characteristics:
    Single layer of flat cells in the renal corpuscle: glomerulus and glomerular (Bowman's) capsule separated by capsular space.

    Functions: Filtration of blood through filtration barriers; water, ions, and molecules with molecular weight less than 40,000 pass through, but formed elements retained.

    Locations: Endothelium of the cardiovascular system, mesothelium, loop of Henle, rete testis, and pulmonary alveoli.
  6. SIMPLE CUBOIDAL EPITHELIUM (RAT KIDNEY)

    Funciton:
    Absorption and secretion.

    Locations: Thyroid, choroid plexus, ducts of many glands, inner surface of the capsule of the lens, covering surface of ovary.
  7. SIMPLE COLUMNAR EPITHELIUM (GALL BLADDER)

    Function:
    Absorption and secretion.

    Locations: Surface epithelium of stomach, small and large intestine, gallbladder, uterus, oviduct, small bronchi of lungs, paranasal sinuses.
  8. SIMPLE CILIATED COLUMNAR EPITHELIUM (OVIDUCT/FALLOPIAN TUBE)

    Locations:
    Nasal cavity, respiratory tract, oviduct.

    Function: Dust trapping.
  9. GOBLET CELLS (MAMMAL)

    Characteristics:
    Unicellular exocrine gland.

    Function: Mucus secretions; cells needed to lubricate small intestine; neutralize bile salts from gall bladder and stomach.

    Location: Small intestine.
  10. STRATIFIED SQUAMOUS EPITHELIUM (VAGINA)

    Location:
    Skin and inner surface of body cavities.

    Function: Keratinized for protection in skin; non-keratinized for protection in esophagus.
  11. TRANSITIONAL EPITHELIUM STRETCHED (BLADDER)

    Characteristics:
    Epithelium is stretched when stretched, organ is full.

    Function: Allows for fluctuation of liquid volume.

    Locations: Urinary bladder, ureter, and uppermost part of urethra.
  12. TRANSITIONAL EPITHELIUM RELAXED (BLADDER)

    Characteristics:
    Relaxed transitional epithelium, organ is empty.

    Function: Allows for fluctuation of liquid volume.

    Location: Urinary bladder.
  13. GLANDULAR EPITHELIUM SIMPLE TUBULAR (HUMAN ILEUM)

    Functions:
    Secretion of enzymes, including sucrose and maltase, along with endopeptidases and exopeptidases.

    Location: Crypts of Lieberkuhn of the small intestine and colon.
  14. GLANDULAR EPITHELIUM SACCULAR

    • Characteristics: Simple alveolar glands.
    • Location: Paraurethral glands in the penile urethra, also sebaceous glands.
  15. PANCREAS (MONKEY)

    Characteristics:
    Second largest gland associated with the gastrointestinal tract.

    Location: Retroperitoneal organ.

    Function: Secretion of digestive enzymes into the small intestine and blood glucose regulation.
  16. ISLET OF LANGERHANS (MAMMAL)

    Characteristics:
    Pale-staining and make up endocrine portion of pancreas.

    Function: Alpha cells secrete glucagon, beta cells secrete insulin; δ- cells secrete somatostatin, which inhibits secretion by alpha and beta cells.
  17. SKIN SEBACEOUS GLAND (BABOON)

    Characteristics:
    Holocrine, meaning the entire cell breaks down and cellular debris, along with the secretory product, is released as sebum.

    Function: Secrete sebum outside of hte cell.

    Location: Scalp and face and around the anus, mouth, and nose; absent in palms of the hands and soles of feet.
  18. SKIN, SWEAT GLAND (MAN)

    Function:
    Regulate body temperature and protective function.

    Characteristics: Two types—Eccrine and Apocrine in nature.

    Location: Eccrine—throughout the surface of the skin. Acrine—axilla and anogenital region.
  19. MAMMARY GLAND, ACTIVE (MAMMAL)

    Characteristics:
    Apocrine in nature, involves cytoplasmic loss with product.

    Function: Milk production or lactation.

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