MCQ epithelial tissues colloquium

are ciliated cells present in simple columnar resorbtive epithelium?

no, ciliated cells are not typically present in simple columnar resorptive epithelium because this type of epithelium is specialized for absorption rather than for movement of materials, so they tend to have microvilli instead of cilia

is simple squamous epithelium found in some endocrine glands like thyroid glands?

no, simple squamous epithelium is not found in the thyroid glands because the thyroid glands are lined by cuboidal to columnar epithelial cells rather than flat cells

The structure of cuboidal and columnar cells supports the functionality required in glandular tissue

is pseudostratified epithelium usually associated with resorbtion?

No, pseudostratified epithelium is not usually associated with resorption; it primarily functions in secretion and movement of mucus, often found in the respiratory tract.

where does stratified squamous keratinizing epithelium originate from?

ectoblast

do the superficial cells of the stratified squamous non-keratinizing epithelium preserve their nuclei?

Yes, the superficial cells of stratified squamous non-keratinizing epithelium retain their nuclei, which is a key characteristic distinguishing them from keratinizing epithelium.

do the simple exocrine glands have a system of branching ducts?

No, simple exocrine glands typically have a single, unbranched duct.

do mucous cells contain well developed rough-surfaced endoplasmic reticulum?

No, mucous cells generally have a well-developed Golgi apparatus and abundant secretory granules, but not rough-surfaced endoplasmic reticulum.

is the regenaration of simple epithelia through the substitutive cells localised between the mature epithelial cells?

Yes, the regeneration of simple epithelia occurs through the substitutive cells that are localized between the mature epithelial cells, allowing for continuous renewal and repair.

is the epithelial tissue devoid of own blood or lymph vessels?

Yes, epithelial tissue is avascular, meaning it does not contain its own blood or lymph vessels. Instead, it receives nutrients through diffusion from underlying connective tissues.

do some epithelial cells have an apical and basal part?

Yes, some epithelial cells are polarized, having distinct apical and basal surfaces that serve different functions.

what are goblet cells in the epithelium of organs of the digestive system described as?

unicellular glands

which is the epithelium of blood and lymph vessels?

simple squamous epithelium

which is the epithelium of lung alveoli?

simple squamous epithelium

goblet cells function

secretory cells

microvilli function

resorbtive cells

what epithelium is evident in thryroid gland?

simple cuboidal epithelium

what epithelium is evident in the trachea?

pseudostratified ciliated columnar epithelium

what epithelium is evident in ureter?

transitional epithelium of Henle

how do epithelial cells connect to the basal lamina membrane?

Epithelial cells connect to the basal lamina membrane through specialized structures called hemidesmosomes, which anchor the cells to the underlying extracellular matrix.

where is convoluted basal lamina found?

stratified epithelia

out of microvilli, cilia, tonofibrils and myofibrils whic is described by stratified epithelia?

tonofibrils, which are intermediate filaments that provide structural support and stability to the cells in stratified epithelia.

what are melanocytes?

pigmentous neuroepithelial cells

which from eleidin, keratohyalin, keratin and mucopolysaccharides is present in the granular layer (stratum granulosum) of the stratified suqamous keratinizing epithelium?

keratohyaline

which from eleidin, keratohyalin, keratin and mucopolysaccharides is present in the lucent layer (stratum lucidum) of the stratified squamous keratinizing epithelium?

eleidin

what epithelium is found in the cornea of the eye?

stratified squamous non-keratinizing

glandular epithelium function

secretory

which from acinar, tubular, mixed and tubuloalveolar is not designated to the shape of secretory portions by the exocrine glands?

mixed

what does serous type of secret contain?

protein

what does the nuclei of mucous acinar cells?

flattened

what are the serous crescents or demilunes of Giannuci?

serous cells in mixed acini

what staining is used for muscous acini?

PAS reaction

where is simple columnar secretory epithelium found in?

stomach, large intestine

which of the cells are specific for transitional epithelium of Henle?

basal, polyhedral, superficial binucleate

what features are specific for stratified squamous non-keratinizing epithelium?

convoluted basal membrane, superficial cells with preserved nuclei, presence of different in shape cells

what features are specific for stratified squamous keratinizing epithelium?

convoluted basal membrane

keratohyalin granules

presence of different in shape cells

what features are specific for serous acini?

cells with spherical nuclei

basophilic cytoplasm

narrow lumen

which features are specific for mucous acini?

PAS positive reaction

cells with flattened nuclei

wide lumen

which features are specific for exocrine glandular epithelium?

• secretory product is transported to a surface

• secretion of enzymes

which features are speicific for endocrine glandular epithelium?

• lack of excretory ducts

• releasing of hormones

which substances are designed as keratin precursors?

• tonofibrils

• keratohyalin

• eleidin

which features are specific for stratified squamous non-keratinizing epithelium of cornea?

• non-convoluted basal membrane

• 10 layers of cells

what is present in simple columnar resporbtive epithelium?

• basal (germinative)

• columnar cells with microvilli

• goblet cells

which features are specific for epithelial tissue?

• covering the hollow organs

• cells posses an apical and basal portion

• presence of numberous nerves and nerve endings

main function of epithelial tissue?

• covering

• secretory

• resorbtive

which are features of covering epithelium?

• cells posses an apical and basal portion

• cells are arranged in single or multiple layers

• specializations of the cell surface

which is specific for pseudostratified columnar ciliated epithelium?

• presence of ciliated cells

• presence of goblet cells

• all cells are adjacent to the basal lamina

what are the tpyes of simple epithelia?

• simple squamous

• simple cuboidal

• simple columnar

• pseudostratified columnar ciliated

• transitional of Henle

what are the cellular types evident in simple columnar resorbtive epithelium?

• resorbtive

• mucous goblet

• substitutive (germinative)

what are the cellular types evident in transitional epithelium of Henle?

• basal

• polyhedral

• superficial (binucleate umbrella-like)

specific microscopic features of stratified epithelia

• convoluted basal membrane

• more than 1 cell layer

• different shape cells

layers of stratified squamous keratinizing

• stratum basale

• stratum spinosum

• stratum granulosum

• stratum lucidum

• stratum corneum

what is the regeneration of stratified epithelia associated with?

substitutive cells localised upon the basal membrane

depending on secretion glandular epithelium are?

exocrine

endocrine

depending on their secret acini are

• serous

• mucous

• mixed

depending on secretory units their exocrine glands are

• acinous (alveolar)

• tubular

• tubulo-acinar

what are the types of stratified squamous epithelium?

• stratified squamous non-keratinizing

• stratified squamous non-keratinizing of corea

• stratified sqaumous keratizining

LM observation of paraffin section stained with H-E, epithelial cells resting on basal lamina is observed, cell nuclei lying at different levels in a perpendicular section, some of the epithelia cells have cillia on their apical part. what is the tissue?

Pseudostratified columnar ciliated epithelium

LM observation of paraffin section of stain H-E epithelial cells lying on straight basal lamina is observed, the apical part of the cell is striated and their nuclei are ovoid, perpendicular oriented to the basal lamina, some cells appear with unstained cytoplasm. what is the epitheial tissue?

Simple columnar resorbtive epithelium of small intestine

LM observation of paraffin section stained with H-E, epithelial cells lying on convoluted basal lamina is seen, epithelial sheet is composed of different in shape-cells - columnar, polygonal, and flattened arranged in layers, most superficial cells appear with preserved nucleu, the deeper epithelial layers show basophilia of cell cytoplasm. what is the epithelial tissue?

stratified squamous non-keratinizing

LM observation of parafinn section stained with H-E, acini composed of high columnar cells with basal basophilic cytoplasm and apical secretory granules are found, the ceull nuclei are large and localized appears very small, narrow. what type of acini?

Serous acini

LM obvservation of paraffin section stained with H-E acini composed of cells wiht unstained cytoplasm and flattened nuclei localized in its basal part are visible, the acinus lumen appears large, wide. what type of acini?

Mucous acini