Term
| What are the five functions of epithelia? |
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Definition
| Protection, Secretion, Absorption, Sensory and Transport |
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Term
| What embryonic tissue is epithelia derived from? |
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Definition
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Term
| What is the general shape of epithelia? |
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Definition
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Term
| How do epithelia cells interact? |
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Definition
| cell-cell junctions- tight, zonule adherens and macula adherens. For communication and barrier functions |
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Term
| What anchors epithelia to its basement membrane? |
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Definition
| hemidesmosomes (cell-basement membrane junctions) |
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Term
| T/F : epithelia contain blood vessels |
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Definition
| False: nutrients diffuse from blood vessels in underlying connective tissue through basement membrane |
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Term
| What are the three shapes of epithelia? |
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Definition
| Squamous, cuboidal and columnar |
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Term
| How many layers do simple epithelia have? |
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Definition
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Term
| How many layers does stratified epithelia have? |
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Definition
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Term
| How many layers does pseudostratified epithelia have? |
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Definition
| one layer but appears to have many |
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Term
| T/F : microvilli, cilia, goblet cells AND sterocilia are only found on simple or pseudostratified epithelia |
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Definition
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Term
| Where on epithelia are flagella found? |
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Definition
| nowhere- not found on epithelia (call me Dr. Reed) |
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Term
| What are goblet cells filled with? |
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Definition
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Term
| Describe the structure of a goblet cell |
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Definition
| wide top, narrow base, unicellular gland and granular cytoplasm |
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Term
| What is the main function of goblet cells? |
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Definition
| Make mucus (which protects epithelium, traps debris and lubricates) |
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Term
| Where is simple squamous epithelia found? |
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Definition
Only in protected areas
-lines blood vessels
-lines body cavities
-lines posterior surface of cornea
-in kidney tubules |
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Term
| What type of cells have deep cuboidal cell layers that flatten as they get closer to the surface? |
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Definition
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Term
| What advantage do stratified squamous cells have over simple squamous cells? |
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Definition
| Higher resistance to friction- ability to replace sloughed off surface cells |
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Term
| Where is stratified squamous epithelia found? |
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Definition
| oral cavity, esophagus, anal canal, uterine cervix/vagina, cornea |
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Term
| What type of epithelia leave behind a tough skeleton when superficial cells die? |
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Definition
| Keratinizing stratified squamous |
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Term
| Where is Keratinizing Stratified Squamous epithelia found? |
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Definition
| Oral cavity, esophagus, forestomachs of herbivores |
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Term
| What type(s) of epithelia can keratin be found on? |
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Definition
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Term
| How many layers are found in simple cuboidal epithelia? |
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Definition
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Term
| Where are simple cuboidal epithelia found? |
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Definition
| Kidney tubules, pancreas, salivary gland and ducts |
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Term
| How are nuclei of simple columnar epithelia aligned? |
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Definition
| apical(top) and basal(bottom) |
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Term
| What 3 types of epithelia can contain goblet cells? |
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Definition
| simple columnar, simple columnar with cilia and pseudostratified columnar |
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Term
| Where is simple columnar epithelia found? |
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Definition
| intestines and gall bladder |
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Term
| What type of epithelia is primarily found in the female reproductive tract? |
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Definition
| simple columnar with cilia |
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Term
| What type of epithelia is primarily found in the respiratory tract? |
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Definition
| pseudostratified columnar |
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Term
| What type of columnar epithelia has a more cuboidal bottom layer? |
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Definition
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Term
| Why is transitional epithelia "appropriate" for the urinary tract? |
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Definition
| It is more resistant to irritation of urine |
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Term
| What type of gland secretes directly into the blood stream? |
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Definition
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Term
| What type of gland is thyroid? |
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Definition
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Term
| What type of gland utilizes goblet cells? |
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Definition
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Term
| What distinguishes simple from compound multicellular glands? |
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Definition
| simple does not branch; compound does |
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Term
| T/F : the secretory component of simple multicellular glands does not branch |
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Definition
| False- SECRETORY COMPONENT may or may not branch |
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Term
| What are the three shapes of tubular glandular secretory components? |
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Definition
| Straight, coiled and branched |
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Term
| How are acinar secretory components structured? |
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Definition
| cells are arranged around a sphere |
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Term
| Where are tubuloalveolar secretory components found? |
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Definition
| salivary gland and mammary glands |
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Term
| What method of secretion involves membrane bound secretory vesicles that form in the cytoplasm and then fuse with the luminal cell membrane to release contents outside of cell |
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Definition
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Term
| How is apocrine secretion achieved? |
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Definition
| membrane bound pieces of the apical portion of the cell pinch off? |
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Term
| How does holocrine secretion occur? |
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Definition
| The entire cell "falls off" and becomes the secretory product |
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Term
| What type of secretion is watery, has eosinophilic secretory granules concentrated towards top of cell and has round nuclei? |
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Definition
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Term
| What structural characteristic distinguishes mucus secretions? |
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Definition
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Term
| T/F : all mucus-secreting cells are goblet cells |
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Definition
| FALSE- all goblet cells are mucus cells but NOT all mucus cells are goblet cells |
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Term
| Where are both serous and mucus secretions found? |
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Definition
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Term
| What do myoepithelial cells do? |
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Definition
| Move secretions from the acinus to the duct |
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Term
| What method of secretion do sebaceous glands use? |
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Definition
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