Epithelial tissues Flashcards
How many layers of cells are present in simple epithelium?
One
Two or more
One
What is the function of microvilli?
Movement of substances across cell surface
Protection
Absorption
Secretion
Absorption
The proximal convoluted tubule is the site where essential substances are actively reabsorbed. Why does the epithelial lining of the proximal convoluted tubule stain more intensely than in the distal convoluted tubules?
Contains more organelles
Contains lipid droplets
Contains more blood
Contains more organelles
The cells here contain more organelles to support all of the processes required to facilitate active reabsorption.
What type of epithelium is endothelium?
Stratified squamous
Simple columnar
Simple squamous
Simple squamous
What type of epithelium is respiratory epithelium?
Simple columnar epithelium
Pseudostratified epithelium
Stratified squamous epithelium
Transitional epithelium
Pseudostratified epithelium
Pseudostratified epithelium is only found lining the respiratory tract and is sometimes referred to as respiratory epithelium.
Pseudostratified epithelium usually contains goblet cells. What is the function of goblet cells?
Production of keratin
Synthesise and secrete cilia on the apical surface
Phagocytose particles on surface of epithelia
Synthesise and secrete mucus
Synthesise and secrete mucus
What feature of the simple squamous epithelial lining of the alveoli is important in gaseous exchange?
Very thin to facilitate diffusion
Presence of mucus to trap particles
Large surface area to allow fluid retention
Very thin to facilitate diffusion
Simple epithelia are found lining surfaces involved in passive diffusion. Typically, where active processes are required, such as absorption, the cells are either cuboidal (such is in the proximal convoluted tubule) or columnar (such as in the small intestine) to house the additional cellular organelles required to perform the active processes.
What function does stratified squamous epithelium facilitate?
Protection
Absorption
Secretion
Diffusion
Protection
The multiple surface layers provide protection from mechanical
abrasion and microbial invasion.
How are cells in the intermediate layers attached to each other?
Attachment filaments
Desmosomes
Hemidesmosomes
Desmosomes
In which other location can non-keratinising stratified squamous epithelia be found?
The floor of the mouth
The lining of the intestine
Gingival tissues
The hard palate
The floor of the mouth
The floor of the mouth, like the rest of the lining of the oral
cavity, consists of a stratified squamous epithelium. Keratinised stratified
squamous epithelium is found only in regions subject to masticatory mechanical
forces, such as gingival tissues and the hard palate.
What is the main function of the epithelial lining of the upper respiratory tract?
Protection from mechanical abrasion
Gaseous exchange
Phagocytosis
Trap and remove particles
Trap and remove particles
Cilia beat rhythmically to propel surface layer of mucus containing
trapped particles towards the pharynx.
The epithelial lining in which other location contains goblet cells?
Lung
Ureter
Gastrointestinal tract
Kidney
Gastrointestinal tract
Goblet cells are modified epithelial cells that secrete mucus on the
surface of the epithelia lining respiratory, gastrointestinal and reproductive
tracts.
Which of the following diseases is characterised by an increase in the number of mucous glands in the bronchial walls?
Chronic bronchitis
Cystic fibrosis
Interstitial fibrosis
Chronic bronchitis
Bronchitis is inflammation of bronchial tubes. Acute bronchitis is
very common. Chronic bronchitis is more serious condition, often associated
with smoking. Mucous gland hyperplasia is the histological hallmark of chronic
bronchitis.
What is the correct classification of this epithelium?
simple squamous
stratified squamous
simple cuboidal
stratified cuboidal
simple cuboidal
What is the correct classification of this epithelium?
Transitional
What is the classification of this epithelium?
Simple squamous
What is the classification of this epithelium?
pseudostratified
What is the correct classification of this epithelium?
simple squamous
stratified squamous
simple cuboidal
stratified cuboidal
stratified squamous
What is the classification of this epithelium?
simple cuboidal
stratified cuboidal
simple columnar
pseudo stratified
stratified cuboidal
What is the classification of this epithelium?
simple squamous
simple cuboidal
simple columnar
simple squamous
What is the classification of this epithelium?
pseudostratified
simple columnar
stratified columnar
respiratory epithelium
simple columnar
