UCONN PNB 2264 EXAM 1 EXAM
QUESTIONS AND ANSWERS
Epithelial tissue - Correct Answers -Forms glands, covers and lines cavities, protects,
acts as barrier
Paracellular transport - Correct Answers -transport between cells
tight junctions - Correct Answers -specialized connections between adjacent cell
membranes that are impermeable- like a zipper, formed by claudin
hemidesomes - Correct Answers -link epithelial cells to basement
membrane/connective tissue
desmosomes - Correct Answers -link two adjacent cells by membrane protein plaques
linked to cell filaments
stratified squamous - Correct Answers -thick and provides protection, found in areas
subject to deterioration like our skin, cuboidal on bottom and squamous on top
stratified cuboidal and columnar - Correct Answers -glandular tissues, cuboidal are in
sweat and mammary ducts while columnar are in glandular ducts, pharynx, male
urethra, and junctions between epithelia types
what surfaces do epithelial cell arrangement create? - Correct Answers -apical and
basolateral surfaces
apical surface - Correct Answers -exposed to external body cavities or lumens of hollow
organs
basolateral surfaces - Correct Answers -tethered to basement membrane
basement membrane - Correct Answers -composed of connective tissue and critical to
underlying cell matrix- responsible for establishing boundaries, resisting tears, and
reinforcing tissues
microvilli and cilia - Correct Answers -both are on apical surface and propel movement
why is polarity important in epithelial cells? - Correct Answers -avascular so polarity is
needed for selective movement of substances between openings and lumens and the
bloodstream
, simple tissue - Correct Answers -single layer that is desired for absorption secretion or
filtration
stratified tissue - Correct Answers -multiple layers and provide protection in areas of
high friction and exposure
pseudostratified tissue - Correct Answers -single layer of cells that look like multiple
layers
transitional tissue - Correct Answers -multiple levels that allow flexibility
simple squamous tissue - Correct Answers -flattened and dense cells typically found in
alveoli or kidney tubule gloneruli, specialized lining in lymphatic and blood vessels to
minimize friction
simple cuboidal - Correct Answers -tall and wide, ideal for secretion and absoroption,
found in glands and kidney tubules
simple columnar - Correct Answers -tall and tightly packed with cilia and microvili, found
in digestive and respiratory tracts lining and forms folds with puts for mucous and
intestinal juice secretion
pseudostratified columnar - Correct Answers -different heights and thickness found in
respiratory tracts with cilia to enhance propulsion of dust and microbes, also have
goblet cells
goblet cells - Correct Answers -secrete mucus that traps matter
how does epithelium regenerate? - Correct Answers -lower cells in the basolateral
surface divide and move up to replace the top layer
transitional epithelium - Correct Answers -stratified where cells respond to stretch by
changing shape, basal levels are cuboidal and columnar while the top is
rounded/squamous, found in urinary tubes and bladder
endocrine glands - Correct Answers -produce hormones that travel through blood to
target organs
exocrine glands - Correct Answers -secrete products into ducts and out of the body
unicellular exocrine glands - Correct Answers -mucous and goblet cells which use
exocytosis to skin surface, found in respiratory tract
multicellular exocrine glands - Correct Answers -tubular duct and secretory gland cells
encapsulated by fibrous connective tissue capsule that provide blood supply
QUESTIONS AND ANSWERS
Epithelial tissue - Correct Answers -Forms glands, covers and lines cavities, protects,
acts as barrier
Paracellular transport - Correct Answers -transport between cells
tight junctions - Correct Answers -specialized connections between adjacent cell
membranes that are impermeable- like a zipper, formed by claudin
hemidesomes - Correct Answers -link epithelial cells to basement
membrane/connective tissue
desmosomes - Correct Answers -link two adjacent cells by membrane protein plaques
linked to cell filaments
stratified squamous - Correct Answers -thick and provides protection, found in areas
subject to deterioration like our skin, cuboidal on bottom and squamous on top
stratified cuboidal and columnar - Correct Answers -glandular tissues, cuboidal are in
sweat and mammary ducts while columnar are in glandular ducts, pharynx, male
urethra, and junctions between epithelia types
what surfaces do epithelial cell arrangement create? - Correct Answers -apical and
basolateral surfaces
apical surface - Correct Answers -exposed to external body cavities or lumens of hollow
organs
basolateral surfaces - Correct Answers -tethered to basement membrane
basement membrane - Correct Answers -composed of connective tissue and critical to
underlying cell matrix- responsible for establishing boundaries, resisting tears, and
reinforcing tissues
microvilli and cilia - Correct Answers -both are on apical surface and propel movement
why is polarity important in epithelial cells? - Correct Answers -avascular so polarity is
needed for selective movement of substances between openings and lumens and the
bloodstream
, simple tissue - Correct Answers -single layer that is desired for absorption secretion or
filtration
stratified tissue - Correct Answers -multiple layers and provide protection in areas of
high friction and exposure
pseudostratified tissue - Correct Answers -single layer of cells that look like multiple
layers
transitional tissue - Correct Answers -multiple levels that allow flexibility
simple squamous tissue - Correct Answers -flattened and dense cells typically found in
alveoli or kidney tubule gloneruli, specialized lining in lymphatic and blood vessels to
minimize friction
simple cuboidal - Correct Answers -tall and wide, ideal for secretion and absoroption,
found in glands and kidney tubules
simple columnar - Correct Answers -tall and tightly packed with cilia and microvili, found
in digestive and respiratory tracts lining and forms folds with puts for mucous and
intestinal juice secretion
pseudostratified columnar - Correct Answers -different heights and thickness found in
respiratory tracts with cilia to enhance propulsion of dust and microbes, also have
goblet cells
goblet cells - Correct Answers -secrete mucus that traps matter
how does epithelium regenerate? - Correct Answers -lower cells in the basolateral
surface divide and move up to replace the top layer
transitional epithelium - Correct Answers -stratified where cells respond to stretch by
changing shape, basal levels are cuboidal and columnar while the top is
rounded/squamous, found in urinary tubes and bladder
endocrine glands - Correct Answers -produce hormones that travel through blood to
target organs
exocrine glands - Correct Answers -secrete products into ducts and out of the body
unicellular exocrine glands - Correct Answers -mucous and goblet cells which use
exocytosis to skin surface, found in respiratory tract
multicellular exocrine glands - Correct Answers -tubular duct and secretory gland cells
encapsulated by fibrous connective tissue capsule that provide blood supply
