A&P 101: Integumentary System
Exam Questions with Correct
Detailed Answers
Skin Cancer Types - Answer- Basal cell carcinoma: Most common; least deadly;
Squamous cell carcinoma: Sun-exposed areas; Moderate risk; Melanoma: Arises from
melanocytes; Most deadly; least common
Hypodermis - Answer- Deep to dermis; not part of skin. Made of adipose and areolar
tissue. Functions: insulation, energy storage, shock absorption.
Stratum Spinosum - Answer- Desmosomes, Langerhans cells.
Stratum Granulosum - Answer- Keratinization begins.
Stratum Lucidum - Answer- Clear layer; only in thick skin.
Stratum Corneum - Answer- Dead keratinized cells; barrier.
Shaft - Answer- Visible part above skin.
Root - Answer- Below skin surface.
Bulb - Answer- Enlarged base in follicle; contains matrix for growth.
Arrector Pili Muscle - Answer- Smooth muscle attached to follicle; contracts to cause
goosebumps.
Eccrine Glands - Answer- Found all over; watery sweat for thermoregulation.
Apocrine Glands - Answer- Armpits/groin; protein-rich sweat; active at puberty.
Sebaceous Gland - Answer- Secretes sebum into hair follicle; lubricates skin/hair.
Meissner's Corpuscle - Answer- In papillary dermis; detects light touch.
Pacinian Corpuscle - Answer- In reticular dermis/hypodermis; detects deep
pressure/vibration.
Root Hair Plexus - Answer- Nerve endings around hair follicle; detects hair movement.
Exam Questions with Correct
Detailed Answers
Skin Cancer Types - Answer- Basal cell carcinoma: Most common; least deadly;
Squamous cell carcinoma: Sun-exposed areas; Moderate risk; Melanoma: Arises from
melanocytes; Most deadly; least common
Hypodermis - Answer- Deep to dermis; not part of skin. Made of adipose and areolar
tissue. Functions: insulation, energy storage, shock absorption.
Stratum Spinosum - Answer- Desmosomes, Langerhans cells.
Stratum Granulosum - Answer- Keratinization begins.
Stratum Lucidum - Answer- Clear layer; only in thick skin.
Stratum Corneum - Answer- Dead keratinized cells; barrier.
Shaft - Answer- Visible part above skin.
Root - Answer- Below skin surface.
Bulb - Answer- Enlarged base in follicle; contains matrix for growth.
Arrector Pili Muscle - Answer- Smooth muscle attached to follicle; contracts to cause
goosebumps.
Eccrine Glands - Answer- Found all over; watery sweat for thermoregulation.
Apocrine Glands - Answer- Armpits/groin; protein-rich sweat; active at puberty.
Sebaceous Gland - Answer- Secretes sebum into hair follicle; lubricates skin/hair.
Meissner's Corpuscle - Answer- In papillary dermis; detects light touch.
Pacinian Corpuscle - Answer- In reticular dermis/hypodermis; detects deep
pressure/vibration.
Root Hair Plexus - Answer- Nerve endings around hair follicle; detects hair movement.