BIO 201 EXAM 2 WITH CORRECT
ANSWERS 2025
Describe the epidermis in detail correct answers >>
keratinized stratified squamous epithelium; no blood vessels;5
zones layers
What are the 5 zones of the epidermis? Come Lets Get Sun
Burned correct answers >> stratum corneum
stratum lucidum
stratum granulosum
stratum spinosum
stratum basale
stratum corneum correct answers >> up to 30 layers, dead
scaly keratinized cells,resistant to abrasion and water loss. MOST
SUPERFICIAL LAYER
stratum lucidum correct answers >> -in thick skin only, no
nuclei or organelles, cells are filled with eleidin.
stratum granulosum correct answers >> -3-5 layers of
granule and vesicle containing keratinocytes,cells are dying,
forms an epidermal water barrier that waterproofs the skin, cells
above die because they are cut off from the nutrients.
,stratum spinosum correct answers >> -thickest layer, 2nd
deepest, more living kerinocytes, contains dendritic cells.
stratum basale correct answers >> -DEEPEST LAYER; cells
that divide rapidly, connective tissues underneath, single layer of
cuboidal or low columnar sitting on basement membrane.
((and then dermis))
eumelanin correct answers >> black/ brown
pheomelanin correct answers >> reddish-yellow
Describe the dermis correct answers >> 2 dermal layers/
deeper then epidermis: papillary, reticular layers
papillary correct answers >> areolar tissue, allows for
motility of white blood cells
reticular layers correct answers >> thick collagen,
responsible for stretch marks adipocytes
dermal papilla correct answers >> are upward extensions of
the dermis into the epidermis forming the ridges of the
fingerprints
piloerector muscles correct answers >> smooth muscles
(skeleton muscle in face((emotions)))
, Describe the structure and function of the hypodermis correct
answers >> binds skin to underlying tissue, lots of adipose,
energy reservoir, thermal insulation, hypodermic injections into
subcutaneous tissue since highly vascular
List terms that are synonymous with hypodermis correct
answers >> subcutaneous tissue or superficial fascia
Recall the various pigments that can contribute to skin color
correct answers >> hemoglobin, carotene, melanin
hemoglobin correct answers >> - red pigment of red blood
cells
carotene correct answers >> - yellow pigment from diet
cyanosis correct answers >> - blueness from Oxygen
deficiency in blood (cold)
erythma correct answers >> - redness due to dilated
cutaneous vessels(blushing)
jaundice correct answers >> - yellowing due to excess of
bilirubin in blood(liver disease)
bronzing correct answers >> - golden-brown color- addison
disease (deficiency of glucocortoid hormone)
ANSWERS 2025
Describe the epidermis in detail correct answers >>
keratinized stratified squamous epithelium; no blood vessels;5
zones layers
What are the 5 zones of the epidermis? Come Lets Get Sun
Burned correct answers >> stratum corneum
stratum lucidum
stratum granulosum
stratum spinosum
stratum basale
stratum corneum correct answers >> up to 30 layers, dead
scaly keratinized cells,resistant to abrasion and water loss. MOST
SUPERFICIAL LAYER
stratum lucidum correct answers >> -in thick skin only, no
nuclei or organelles, cells are filled with eleidin.
stratum granulosum correct answers >> -3-5 layers of
granule and vesicle containing keratinocytes,cells are dying,
forms an epidermal water barrier that waterproofs the skin, cells
above die because they are cut off from the nutrients.
,stratum spinosum correct answers >> -thickest layer, 2nd
deepest, more living kerinocytes, contains dendritic cells.
stratum basale correct answers >> -DEEPEST LAYER; cells
that divide rapidly, connective tissues underneath, single layer of
cuboidal or low columnar sitting on basement membrane.
((and then dermis))
eumelanin correct answers >> black/ brown
pheomelanin correct answers >> reddish-yellow
Describe the dermis correct answers >> 2 dermal layers/
deeper then epidermis: papillary, reticular layers
papillary correct answers >> areolar tissue, allows for
motility of white blood cells
reticular layers correct answers >> thick collagen,
responsible for stretch marks adipocytes
dermal papilla correct answers >> are upward extensions of
the dermis into the epidermis forming the ridges of the
fingerprints
piloerector muscles correct answers >> smooth muscles
(skeleton muscle in face((emotions)))
, Describe the structure and function of the hypodermis correct
answers >> binds skin to underlying tissue, lots of adipose,
energy reservoir, thermal insulation, hypodermic injections into
subcutaneous tissue since highly vascular
List terms that are synonymous with hypodermis correct
answers >> subcutaneous tissue or superficial fascia
Recall the various pigments that can contribute to skin color
correct answers >> hemoglobin, carotene, melanin
hemoglobin correct answers >> - red pigment of red blood
cells
carotene correct answers >> - yellow pigment from diet
cyanosis correct answers >> - blueness from Oxygen
deficiency in blood (cold)
erythma correct answers >> - redness due to dilated
cutaneous vessels(blushing)
jaundice correct answers >> - yellowing due to excess of
bilirubin in blood(liver disease)
bronzing correct answers >> - golden-brown color- addison
disease (deficiency of glucocortoid hormone)
