Histology Epithelium and CT (Reynolds) Flashcards
what is epithelial tissue derived from?
all 3 germ layers
what are the components of the basement membrane?
What does the BM control?
- collagen (types 4 and 7)
- proteoglycans (protein core + GAG)
- Laminin, Entactin, Fibronectin
- underlying reticular fibers
controls cellular growth, metabolism, differentiation
what are the three layers of the basement membrane from superficial to deep?
- lamina lucia
- lamina densa (basal lamina)
- lamina fibroreticularis
where would you find epithelial tissue?
covering body surfaces, lining cavities, lining ducts/glands, lining organs
Which two simple squamous epithelium types are mesodermally derived?
endothelium -lining vessels
mesothelium - lining body cavities
where would you find simple cuboidal epithelium?
ducts/glands, kidney tubules, thyroid gland
where would you find simple columnar epithelium?
lining stomach, intestines, collecting ducts of kidneys
where would you find psuedostratified ciliated columnar epithelium ?
nasal cavity, trachea, bronchi
moves mucus with cilia
where would you find stratified squamous epithelium ?
skin, anus, vagina,
any place with lots of abrasion actions
what are some luminal surface modification of epithelial tissue?
cilia- movement
microvilli - absorption
stereocilia (enlongated microvilli)
what are some things epithelial cells can secrete by hormonal and nervous control?
proteins
mucin
lipid
ions and h2o
epithelial cells specialized for production and secretion of proteins would have a well developed?
Rough ER.
lots of polarity
abundant secretory granules
epithelial cells specialized for production and secretion of mucin would have well developed?
RER and supranuclear Golgi.
(Mucin is a proteoglycan, made of protein core + glycosaminoglycans [repeating disaccharides] attached)
Golgi attached the GAGs
epithelial cells specialized for production and secretion of lipid (steroid) would have well developed?
Smooth ER!
Smooth ER for lipid production, detox, and new membrane formation
what are the three types of exocrine secretions?
Merocrine
Apocrine
Holocrine
with Apocrine secretions, product is released with ?
small portion of cytoplasm in envelope of plasma membrane
with Merocrine secretions, product is released by?
vesicles, exiting cell by exocytosis
with Holocrine secretions, product is released by?
accumulation, then released when cell undergoes apoptosis
Two types of exocrine secretions?
mucus vs serous
muscus would be glycosylated, slimy
serous would be watery, not glycosylated
exocrine gland, type of unicellular gland?
goblet cells, single cell in isolation
exocrine gland, type of multicellular gland?
sweat, intestinal, salivary, mammary glands
composed of 1 or more cell
with multicellular exocrine glands, invaginations ____ surface area.
Epithelial cells can be divided into specialized zone with differing functions called ____ cells or ____ cells.
increase
secretory cells or ductal cells
the nomenclature of exocrine glands in regards to branching or non branching is for the ___ portion of the gland.
duct portion
branched duct- compound
non branched duct- simple
Connective Tissue comes from what germ layer?
Mesoderm/mesenchyme
