Epithelial Glands II (exam 1) Flashcards
Each lobule is the equivalent to what
A simple, branched gland
what is Stroma
The CT that surround the entire gland
What are septa (trabeculae)
ar extensions of the capsule into the epithelial components of the gland that divide the gland into subdivisions called lobes and lobules
Acini can be what types of glands
Serous, mucous, or mixed (sero-mucous)
What covers the outer surface of the acinus
The basement membrane
Acini are what
The secretory components of a lobule
Lobules are a subdivision of what
The lobe
what separates lobules
Delicate septae
where can myoepithelial cells be found
between the basement membrane and secretory cells of the acinus
what are myoepithelial cells derived from
Epithelium but are characterized by extensive actin bundles resulting in contractility
What is the function of myoepithelial cells
help to express the secretions of the acini into the intercalated ducts
what are found between the basement membrane and the secretory cells of the acinus
Myoepithelial cells
What are intralobular ducts
Ducts that lie within the lobule
two types: intercalated and striated
what are the two types of intralobular ducts
Intercalated ducts and striated ducts
What is the function of intercalated ducts
drain the secretory acini
involved in bicarbonate/chloride ion exchange
What are intercalated ducts lined with
simple squamous epithelium transitioning to low cuboidal epithelium
What are striated ducts lined with
Simple cuboidal epithelium transitioning to columnar epithelium with basal striations (for active transport)
what is the function of striated ducts
actively reabsorb sodium ions; passively reabsorb chloride ions; actively secrete potassium ions
Why are basal striations present in striated ducts
Caused by the presence of mitochondria
list the order of the ducts
Acinus (gland part) —-> intercalated ducts (simple squamous-simple cuboidal)—>striated duct (simple cuboidal-to-columnar)—-> interlobular ducts (pseudostratified) —–> intralobar ducts (columnar to stratified columnar) —> Lobar ducts (stratified columnar epithelium)
Where are interlobular ducts found
in the septae between adjacent lobules
How are interlobular ducts formed
by the confluence of two or more striated ducts
What are interlobular ducts lined with
pseudostratified columnar epithelium
how are intralobar ducts formed
The confluence of two or more interlobular ducts
