PNB 2274 Lab Practical 1 Exam
Questions and Answers 100% Pass
Epithelial tissue - ✔✔form surface layer of body, line body cavities and hollow organs,
constitute gland tissue
Features of epithelia - ✔✔1) free apical surface
2) fixed basal surface
3) specialized intercellular junctions
4) basement membrane
4) avascular
5) have many sensory nerve endings
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,6) fast regeneration
functions of epithelia - ✔✔1) resist dehydration and injury
2) regulate permeability
3) secretion
4) monitor environment through sensory input to nervous system
classifications of epithelial tissue - ✔✔determined by number of cell layers (simple vs
stratified) and apical cell shape (squamous vs cuboidal vs columnar)
simple cuboidal epithelium - ✔✔found in kidney tubules, ducts of glands
as tall as they are wide (so CUBE), central spherical nucleus
function: absorption and secretion
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,transitional epithelium - ✔✔a stratified epithelium that gives the impression of
transitioning from cuboidal (when relaxed) to squamous (when stretched)
-found in urinary tract
pseudostratified epithelium - ✔✔simple epithelium where all cells contact basal lamina
but not all cells reach apical surface
-nuclei are at different positions which gives impression of stratification
apical cell membrane specializations - ✔✔1) cilia: finger like motile projections
-help with movement
2) microvilli: serve to increase surface area
-found in epithelial cells involved in absorption
3) keratin: protein that protects epithelial cells from damage or stress
-key structural material to our skin
simple cuboidal epithelium pic - ✔✔
simple squamous epithelium - ✔✔
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, simple columnar epithelium - ✔✔
psuedostratified epithelium - ✔✔
ocular micrometer - ✔✔measuring guide placed in one of the oculars of microscope
-used to measure heights of different types of epithelial cells
measuring heights of simple cuboidal and simple columnar - ✔✔measure cells from
basal surface to apical surface
measuring height of simple squamous - ✔✔need to find simple squamous cell in cross
section and then measure it
functions of connective tissue - ✔✔1) structural support
2) binding organs of the body
3) fat storage
4) exchange of nutrients and metabolic waste
5) defense and protection
general components of connective tissue - ✔✔1) cells
2) protein fibers
3) ground substance
Katelyn Whitman, All Rights Reserved © 2025 4
Questions and Answers 100% Pass
Epithelial tissue - ✔✔form surface layer of body, line body cavities and hollow organs,
constitute gland tissue
Features of epithelia - ✔✔1) free apical surface
2) fixed basal surface
3) specialized intercellular junctions
4) basement membrane
4) avascular
5) have many sensory nerve endings
Katelyn Whitman, All Rights Reserved © 2025 1
,6) fast regeneration
functions of epithelia - ✔✔1) resist dehydration and injury
2) regulate permeability
3) secretion
4) monitor environment through sensory input to nervous system
classifications of epithelial tissue - ✔✔determined by number of cell layers (simple vs
stratified) and apical cell shape (squamous vs cuboidal vs columnar)
simple cuboidal epithelium - ✔✔found in kidney tubules, ducts of glands
as tall as they are wide (so CUBE), central spherical nucleus
function: absorption and secretion
Katelyn Whitman, All Rights Reserved © 2025 2
,transitional epithelium - ✔✔a stratified epithelium that gives the impression of
transitioning from cuboidal (when relaxed) to squamous (when stretched)
-found in urinary tract
pseudostratified epithelium - ✔✔simple epithelium where all cells contact basal lamina
but not all cells reach apical surface
-nuclei are at different positions which gives impression of stratification
apical cell membrane specializations - ✔✔1) cilia: finger like motile projections
-help with movement
2) microvilli: serve to increase surface area
-found in epithelial cells involved in absorption
3) keratin: protein that protects epithelial cells from damage or stress
-key structural material to our skin
simple cuboidal epithelium pic - ✔✔
simple squamous epithelium - ✔✔
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, simple columnar epithelium - ✔✔
psuedostratified epithelium - ✔✔
ocular micrometer - ✔✔measuring guide placed in one of the oculars of microscope
-used to measure heights of different types of epithelial cells
measuring heights of simple cuboidal and simple columnar - ✔✔measure cells from
basal surface to apical surface
measuring height of simple squamous - ✔✔need to find simple squamous cell in cross
section and then measure it
functions of connective tissue - ✔✔1) structural support
2) binding organs of the body
3) fat storage
4) exchange of nutrients and metabolic waste
5) defense and protection
general components of connective tissue - ✔✔1) cells
2) protein fibers
3) ground substance
Katelyn Whitman, All Rights Reserved © 2025 4
