Term
| True or false: Epithelium is highly vascular tissue |
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Definition
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Term
| Name the three typical "shapes" for epithelial tissue |
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Definition
Squamous = Flat
Cuboidal = mostly square
Columnar = Taller than it is wide |
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Term
| What type of epithelia does not have an apical free surface, and what types of tissues can it be found? |
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Definition
Epithelioid tissue
IT can be found in endocrine glands like the adrenal gland, anterior pituitary, or in islets of Langerhands
They are found in Epitheloreticular cells of thymus,
and epithelium derived from epithelial tumors (ex: epithelial ovarian carcinoma) |
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Term
| What types of cells line the kidney tubules? |
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Definition
| Simple Cuboidal Epithelium |
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Term
| What types of cells line small ducts of exocrine glands like the pancreas? |
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Definition
| Simple Cuboidal epithelium |
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Term
| What types of cells do you find lining large ducts in exocrine glands? |
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Definition
| Stratified cuboidal epithelium. |
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Term
| Describe the function of simple columnar epithelium found in the cornea of the eye |
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Definition
| It serves a sensory function |
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Term
| True or false: in pseudostratified columnar epithelium, all cells reach the apical lumen |
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Definition
| False. But all cells DO reach the basement membrane. |
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Term
| What is the primary protein that makes up microvilli? |
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Definition
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Term
| Regarding movement, which epithelial modifications are motile, and which ones are not? |
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Definition
Non-motile: microvilli and Stereocilia
Motile: Cilia |
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Term
| What is the primary component of cilia and describe the arrangement |
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Definition
| They are made of microtubules arranged in pairs in a clockwise 9+2 configuration. |
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Term
| What molecular motors move along microtubules? |
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Definition
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Term
| What molecular motors move alone actin filaments? |
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Definition
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Term
| What is the Zonula occuldens? |
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Definition
| They are made up of tight junctions to neighboring cells prevent leakage between them. |
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Term
| What is the zonula adherens? |
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Definition
| These have actin bundles that attach one cell to another |
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Term
| What is the macula adherens? |
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Definition
| This is where desmosomes are found. They join the intermediate filaments of one cell to those of their neighbor |
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Term
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Definition
| It anchors epithelia to the basal lamina |
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Term
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Definition
| This allows the passage of small water-soluble ions and molecules. |
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Term
| What makes up a desmosome? |
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Definition
| They are made up of tonofilaments |
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Term
| In the Zonula occludens, what proteins are you likely to find? |
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Definition
| occludin, claudins, junctional adhesion molecules (JAM) |
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Term
| What protiens are you likely to find in the Zonula adherens? |
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Definition
| Cel adhesion molecules (CAM) Cadherins, integrins, selectins, and immunoglubulin superfamily |
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Term
| How does clostrium perfringens attack epithelial cells? |
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Definition
| They bind to claudin in the zonulua occludens |
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Term
| How does Helicobacter pylori attack epithelial cels? |
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Definition
| They bind to zonula occludens molecules which causes damage to the protective layer of the stomach. |
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Term
| Describe Merocine secretion |
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Definition
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Term
| Describe Apocrine secretion |
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Definition
| The secreted material is surrounded by cytoplasm and a plasma membrane. Ex: apocrine sweat glands |
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Term
| Describe holocrine secretion |
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Definition
| The whole cell is extruded. Example: sebacious glands |
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Term
| Describe the three types of secrtions |
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Definition
Mucous: viscous and slimy. water soluble. Lost during tissue preparation
Serous: Watery, but secretory granules are well preserved
Mixed: Contain both types of secretory cells |
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Term
| What is found in the basal domain of epithelial cells? |
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Definition
| Hemidesmosomes and focal adhesions |
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