BIO 201 EXAM 2 |COMPLETE QUESTIONS WITH 100% RATED EXPERT SOLUTIONS
|2026 LATEST UPDATED
1. integumentary system: skin, hair, nails, sweat glands, sebaceous glands,
sensory receptors
2. functions of the integumentary system: protection, thermoregulation,
sensation, vitamin D synthesis, excretion, immune defense
3. what does the integumentary system protect from?: physical injury,
pathogens, UV radiation, dehydration
4. thermoregulation through...: sweating and blood vessel changes
5. sensation via: touch, pressure, pain, temperature receptors
6. excretion of: water, salts, small wastes
7. the skin is organized into three major layers: epidermis, dermis,
hypodermis
8. subcutaneous layer, not part of the skin proper but closely associated:
hypodermis
,9. the epidermis is: keratinized stratified squamous epithelium, avascular,
nourished by diffusion from the dermis
10. function of the epidermis: form the external protective barrier, limits
water loss, prevents pathogen entry
11. layers of epidermis (deep to superficial): stratum basale, stratum
spinosum, stratum granulosum, stratum corneum, stratum lucidum,
stratum corneum
12. cells are "born here": stratum basale
13. where are keratinocytes found in: all epidermal layers except stratum
basale
14. keratinocytes: most abundant epidermal cell, produce keratin, main
barrier-forming cells
15. keratin: fibrous protein, gives hair nails and skin hardness/water
resistant
, 16. stratum basale: deepest layer, single row mitotically active cells,
attaches epidermis to basement membrane, keratin produced here,
replicates cells
17. stratum basale contains: keratinocyte stem cell, melanocytes, Merkel
cells
18. merkel cells: sensory receptors, connected to sensory nerves,
important for light touch
19. stratum spinosum: several layers of keratinocytes, spiny appearance
due to desmosomes, contain Langerhans cells
20. langerhan cells: immune cells, important antigen presentation and
defense, engulf bacteria, foreign particles, and damaged cells
21. stratum granulosum: cells flatten, keratohyalin granules appear, lipid
secretion contributes to water barrier, cells begin dying
22. granules: protein filled vesicles
23if granules arent filled with keratin they are filled with: melanin
|2026 LATEST UPDATED
1. integumentary system: skin, hair, nails, sweat glands, sebaceous glands,
sensory receptors
2. functions of the integumentary system: protection, thermoregulation,
sensation, vitamin D synthesis, excretion, immune defense
3. what does the integumentary system protect from?: physical injury,
pathogens, UV radiation, dehydration
4. thermoregulation through...: sweating and blood vessel changes
5. sensation via: touch, pressure, pain, temperature receptors
6. excretion of: water, salts, small wastes
7. the skin is organized into three major layers: epidermis, dermis,
hypodermis
8. subcutaneous layer, not part of the skin proper but closely associated:
hypodermis
,9. the epidermis is: keratinized stratified squamous epithelium, avascular,
nourished by diffusion from the dermis
10. function of the epidermis: form the external protective barrier, limits
water loss, prevents pathogen entry
11. layers of epidermis (deep to superficial): stratum basale, stratum
spinosum, stratum granulosum, stratum corneum, stratum lucidum,
stratum corneum
12. cells are "born here": stratum basale
13. where are keratinocytes found in: all epidermal layers except stratum
basale
14. keratinocytes: most abundant epidermal cell, produce keratin, main
barrier-forming cells
15. keratin: fibrous protein, gives hair nails and skin hardness/water
resistant
, 16. stratum basale: deepest layer, single row mitotically active cells,
attaches epidermis to basement membrane, keratin produced here,
replicates cells
17. stratum basale contains: keratinocyte stem cell, melanocytes, Merkel
cells
18. merkel cells: sensory receptors, connected to sensory nerves,
important for light touch
19. stratum spinosum: several layers of keratinocytes, spiny appearance
due to desmosomes, contain Langerhans cells
20. langerhan cells: immune cells, important antigen presentation and
defense, engulf bacteria, foreign particles, and damaged cells
21. stratum granulosum: cells flatten, keratohyalin granules appear, lipid
secretion contributes to water barrier, cells begin dying
22. granules: protein filled vesicles
23if granules arent filled with keratin they are filled with: melanin
