2.4 lab - epithelia Flashcards
T/F the basal end of an epithelial cell membrane is part of the basal lamina
false - the basal lamina is the connective tissue layer that the basal end of an epithelial cell attaches to – it is not the same as the basal cell membrane
what 3.5 criteria do you use to name an epithelial cell layer?
1) # of layers (simple, stratified, pseudostratified)
2) shape of Top Layer cells (squamous, cuboidal, columnar)
2. 5) keratinized vs non-keratinized (if squamous)
3) location of epithelium (epithelium, endothelium, mesothelium)
what are 2 special types of epithelia that demand a name other than “epithelium” ?
- endothelium (blood vessels)
- mesothelium (serosa)
what are 3 modifications to the usual options for classifying epithelia? (usual = 2 kinds of layers and 3 types of shapes)
- pseudostratified
- transitioinal
- karatinized (or non-keratinized)
this kind of epithelium is common in the GI system
simple columnar - absorptive & secretory functions
where are you likely to find simple columnar epithelium?
absorptive / secretory locations – e.g. the GI system
this kind of epithelium is found in areas exposed to abrasive forces
stratified squamous epithelia
where are you are likely to find stratified squamous keratinized epithelia? name an example
areas exposed to abrasive forces but also wet:
- oral cavity
- vagina
where are you are likely to find stratified squamous nonkeratinized epithelia? name an example
skin
T/F every free or lumenal surface in the body is lined by an epithelium
true - this is a “golden rule” … although there are a few exceptions that you are unlikely to encounter in this class
blood and lymphatic vessels are always lined with what kind of epithelium
simple squamous ENDOthelium
give an example of the function of the luminal surface of endothelial cells
selectively grab leukocytes and transport across epithelium
give an example of the function of the basal surface of endothelial cells
initiate clotting if exposed to platelets
where are endothelia found
lining blood & lymphatic vessels
T/F endothelia are always simple squamous
true - i think
what are two names for …monovacuolar cells containing one large lipid droplet surrounded by a thin layer of cytoplasm with the nucleus is flattened on the periphery
unilocular adipocytes or white fat cells
the appearance of a white fat cell
a monovacuolar cell (unilocular adipocyte) containing one large lipid droplet surrounded by a thin layer of cytoplasm with the nucleus flattened on the periphery
another name for a white fat cell
unilocular adipocyte
another name for a unilocular adipocyte
white fat cell
this cell type is polygonal in shape with considerable cytoplasm and lipid droplets scattered throughout with a high concentration of mitochondria. eccentrically located nucleus but not squished on periphery
multilocular adipocytes or brown fat cells
the appearance of a brown fat cell
polygonal in shape with considerable cytoplasm and lipid droplets scattered throughout with a high concentration of mitochondria. eccentrically located nucleus but not squished on periphery
the appearance of a multilocular adipocyte
polygonal in shape with considerable cytoplasm and lipid droplets scattered throughout with a high concentration of mitochondria. eccentrically located nucleus but not squished on periphery
another name for brown fat cell
multilocular adipocyte
another name for multilocular adipocyte
brown fat cell
