Practicals-Epithelium Flashcards
What kind of epithelial cells are found in the kidney?
Simple squamous in bowman’s capsule
Simple columnar in proximal convoluted tubules
What constitutes brush border of proximal convoluted tubule?
Microvilli and glycocalyx to increase surface area for effective reabsorption
What kind of epithelium is found in stomach?
Simple columnar epithelium
What structures are found at the wall of the jejunum?
Microvilli and Goblet cells
What are goblet cells?
Unicellular exocrine glands that secret mucus and do not appear under the microscope due to accumulation of mucus which does not stain
What is the similarity between proximal convoluted tubule and jejunum?
Microvilli and Glycocalyx for absorption
What kind of epithelium does trachea have?
Pseudostratified ciliated columnar epithelium with goblet cells
Why is the epithelium of trachea called pseudostratified?
Appearance of nuclei at different levels because of different cell sizes, but all cells rest at the basement membrane
Function of basal cells in trachea?
Stem cells-produce new cells
In which system is the pseduostratified columnar ciliated epithelium with goblet cells is exclusively associated with?
Respiratory system
What is the function of cilia?
Enables movement of particles along epithelial surface
What kind of epithelium is found in the walls of seminiferous tubules of the testis?
Complex stratified epithelium
Why is the epithelium of seminiferous tubules called complex stratified epithelium?
Because the lining cells undergo mitotic cell division
Where is stereocilia found?
Epididymis
What are stereocilia?
Long non-motile processes
What is the function of stereocilia?
Absorption of residual contents during spermatogenesis
What kind of epithelium is found in the oesophagus?
Stratified squamous epithelium
Why is it called stratified?
More than one layer of cells
Why is it called squamous?
Flattened cells at the superficial layer
Stratified squamous non keratinized epithelium is associated with what type of mucosa?
Wet type of mucosa
Why do cells of stratum corneum appear detached?
Because they don’t have desmosomes in between them
What kind of epithelium found in the urinary bladder?
Transitional
Function of transitional epithelium in the bladder?
Protection, barrier and can be distensible
What is the exocrine part of pancreas made of?
Acini
What is the endocrine part of pancreas made of?
Islets of langerhans
Why do acinar cells have basal basophilia?
Due to abundant rer and ribosomes
What are the two pancreatic ducts?
Intralobular duct and intercalated duct
What are the features of the submandibular salivary gland?
Serous acini, mucous acini, striated ducts
What is the modification seen on the basal surface of cells lining the striated duct of the salivary gland?
In foldings of plasma membrane with numerous mitochondria
Function of infolding of plasma membrane of striated ducts in salivary gland?
Active transportation of ion and water to concentrate saliva
State the type of secretion of submandibular gland?
Merocrine, exocrine gland
