ASU BIO 201 EXAM 2 QUESTIONS WITH
CORRECT ANSWERS 2025
List terms synonymous with Skin CORRECT ANSWER 123
Describe layers of skin CORRECT ANSWER There are two layers:
- Epidermis
- Dermis
What is Epidermus Layer? CORRECT ANSWER Outer layer of stratified squamous epithelium
What is Dermis Layer? CORRECT ANSWER Deeper connective tissue layer
• Compare thick and thin skin CORRECT ANSWER Thin skin: 0.5 - 1-
2mm Thick skin: up to 6mm
• Describe the epidermis in detail CORRECT ANSWER
Superficial to Dermis, Keritinized stratified squamous epithelium, NO BLOOD CELLS AVASCULAR.
• Describe the 5 zones/layers of the epidermis CORRECT ANSWER
STRATUM: Cornuem
Lucidum
Granulosum
Spinosum
Basale
• Explain the functions of different types of cells that reside in the various layers of the epidermis
CORRECT ANSWER
Basale: cells that divide quickly and produce tough fibrus protein filaments, sense touch.
Spinosum: THICKEST, cells alert immune system.
,Granulosum: - 3-5 layers of granule and vesicle and cells form protein-lipid epidermal water barrier.
Lucidum: THIN, cells are filed with eledin.
Cornuem: Dead, scaly keratinized cells.
• Describe the function of melanin CORRECT ANSWER PRODUCE PIGMENT
Melanin shapes and produces skill color, depending on Eumelanin and Pheomelanin produced in body.
• Describe how eumelanin and pheomelanin contribute to skin color CORRECT
ANSWER Eumelanin: black/brown
Pheomelanin: reddish/yellow
• Explain how the epidermal- water barrier is created and its function CORRECT
ANSWER It is created in Stratum Granulosom. forms a protein-lipid epidermal water
barrier.
• Explain why epithelial cells get flat as they ascend toward the surface of the skin -
CORRECT ANSWER -They die as they get closer to the skin because they get cut off from nutrients.
• Explain the ecological role of dust mites in the environment CORRECT
ANSWER They feed off dead skin.
• Describe the dermis CORRECT ANSWER 0.2-
4mm of fibrous connective tissue composed of collageen with elastic and reticular fibers.
• Define dermal papilla and piloerector muscles CORRECT ANSWER
Dermal Papillae: upward extensions of dermis into epidermous forming ridges.
Pilorector muscles: smooth muscle.
• Explain the roles of the two different types of connective tissues in the dermis CORRECT
ANSWER Papillary Layer: loose areolar tissue, to let WBC to move through.
Reticular Layer: dense irregular connective tissue responsible for connective tissue.
, • Describe the structure and function of the hypodermis CORRECT
ANSWER Structure: Subcutaneous tissue
Function: energy resevoir and thermal insulation.
• List terms that are synonymous with hypodermis CORRECT ANSWER Subcutaneous
tissue Superficial fascia.
• Recall the various pigments that can contribute to skin color CORRECT ANSWER Hemoglobin
(red) Carotene (yellow)
• Describe hemangiomas CORRECT ANSWER freckles and moles
• List seven abnormal skin colors and their causes CORRECT ANSWER skin colors:
Blue
red
yellw
golden-brown
pale
genetic lack of melanin
bruise
Abnormal Skin CAUSES CORRECT ANSWER
Cyanosis Erythma
Jaundice
Bronzing
Pallor
Albinism
Hematoma
CORRECT ANSWERS 2025
List terms synonymous with Skin CORRECT ANSWER 123
Describe layers of skin CORRECT ANSWER There are two layers:
- Epidermis
- Dermis
What is Epidermus Layer? CORRECT ANSWER Outer layer of stratified squamous epithelium
What is Dermis Layer? CORRECT ANSWER Deeper connective tissue layer
• Compare thick and thin skin CORRECT ANSWER Thin skin: 0.5 - 1-
2mm Thick skin: up to 6mm
• Describe the epidermis in detail CORRECT ANSWER
Superficial to Dermis, Keritinized stratified squamous epithelium, NO BLOOD CELLS AVASCULAR.
• Describe the 5 zones/layers of the epidermis CORRECT ANSWER
STRATUM: Cornuem
Lucidum
Granulosum
Spinosum
Basale
• Explain the functions of different types of cells that reside in the various layers of the epidermis
CORRECT ANSWER
Basale: cells that divide quickly and produce tough fibrus protein filaments, sense touch.
Spinosum: THICKEST, cells alert immune system.
,Granulosum: - 3-5 layers of granule and vesicle and cells form protein-lipid epidermal water barrier.
Lucidum: THIN, cells are filed with eledin.
Cornuem: Dead, scaly keratinized cells.
• Describe the function of melanin CORRECT ANSWER PRODUCE PIGMENT
Melanin shapes and produces skill color, depending on Eumelanin and Pheomelanin produced in body.
• Describe how eumelanin and pheomelanin contribute to skin color CORRECT
ANSWER Eumelanin: black/brown
Pheomelanin: reddish/yellow
• Explain how the epidermal- water barrier is created and its function CORRECT
ANSWER It is created in Stratum Granulosom. forms a protein-lipid epidermal water
barrier.
• Explain why epithelial cells get flat as they ascend toward the surface of the skin -
CORRECT ANSWER -They die as they get closer to the skin because they get cut off from nutrients.
• Explain the ecological role of dust mites in the environment CORRECT
ANSWER They feed off dead skin.
• Describe the dermis CORRECT ANSWER 0.2-
4mm of fibrous connective tissue composed of collageen with elastic and reticular fibers.
• Define dermal papilla and piloerector muscles CORRECT ANSWER
Dermal Papillae: upward extensions of dermis into epidermous forming ridges.
Pilorector muscles: smooth muscle.
• Explain the roles of the two different types of connective tissues in the dermis CORRECT
ANSWER Papillary Layer: loose areolar tissue, to let WBC to move through.
Reticular Layer: dense irregular connective tissue responsible for connective tissue.
, • Describe the structure and function of the hypodermis CORRECT
ANSWER Structure: Subcutaneous tissue
Function: energy resevoir and thermal insulation.
• List terms that are synonymous with hypodermis CORRECT ANSWER Subcutaneous
tissue Superficial fascia.
• Recall the various pigments that can contribute to skin color CORRECT ANSWER Hemoglobin
(red) Carotene (yellow)
• Describe hemangiomas CORRECT ANSWER freckles and moles
• List seven abnormal skin colors and their causes CORRECT ANSWER skin colors:
Blue
red
yellw
golden-brown
pale
genetic lack of melanin
bruise
Abnormal Skin CAUSES CORRECT ANSWER
Cyanosis Erythma
Jaundice
Bronzing
Pallor
Albinism
Hematoma
