BIO 168 Integumentary System Exam
Questions and Answers 100% Pass
Integumentary system functions - ✔✔body temperature regulation,
Vitamin D3 synthesis, lipid storage, sensory input
Cutaneous membrane contains... - ✔✔dermis and epidermis
epidermis functions - ✔✔protects the dermis, prevents water loss and entry
of pathogens, synthesizes D3, sensory receptors
dermis layers - ✔✔papillary and reticular
papillary layer - ✔✔nourishes and supports epidermis
reticular layer - ✔✔has sensory receptors that detect touch, pressure, pain,
vibration, and temperature. Blood vessels assist in thermoregulation
Accessory structures of the skin - ✔✔hair follicles, exocrine glands, nails
1
100% Pass Guarantee Katelyn Whitman, All Rights
, purpose of hair on skin - ✔✔protect skull and provide delicate touch
sensations on body surface
purpose of exocrine glands - ✔✔assist in temperature regulation and waste
excretion
purpose of nails - ✔✔protect and support tips of fingers and toes
Five layers of epidermis, bottom to top - ✔✔basal layer, stratum spinosum,
stratum granulosum, stratum lucidum, stratum corneum
basal layer - ✔✔single cell layer in contact with dermis, where all
keratinocytes originate, only place you find melanocytes & merkel cells
stratum spinosum - ✔✔several layers of cells, thickest layer of "thin" skin,
stratum granulosum - ✔✔3-4 flattened cell layers, contain chemical
precursor to keratin . (keratohylin), looks grainy
stratum lucidum - ✔✔normally a very thin layer of cells, only visible in
calloused skin
stratum corneum - ✔✔hundreds of layers of thick, dead, keratin-filled cells
2
100% Pass Guarantee Katelyn Whitman, All Rights
Questions and Answers 100% Pass
Integumentary system functions - ✔✔body temperature regulation,
Vitamin D3 synthesis, lipid storage, sensory input
Cutaneous membrane contains... - ✔✔dermis and epidermis
epidermis functions - ✔✔protects the dermis, prevents water loss and entry
of pathogens, synthesizes D3, sensory receptors
dermis layers - ✔✔papillary and reticular
papillary layer - ✔✔nourishes and supports epidermis
reticular layer - ✔✔has sensory receptors that detect touch, pressure, pain,
vibration, and temperature. Blood vessels assist in thermoregulation
Accessory structures of the skin - ✔✔hair follicles, exocrine glands, nails
1
100% Pass Guarantee Katelyn Whitman, All Rights
, purpose of hair on skin - ✔✔protect skull and provide delicate touch
sensations on body surface
purpose of exocrine glands - ✔✔assist in temperature regulation and waste
excretion
purpose of nails - ✔✔protect and support tips of fingers and toes
Five layers of epidermis, bottom to top - ✔✔basal layer, stratum spinosum,
stratum granulosum, stratum lucidum, stratum corneum
basal layer - ✔✔single cell layer in contact with dermis, where all
keratinocytes originate, only place you find melanocytes & merkel cells
stratum spinosum - ✔✔several layers of cells, thickest layer of "thin" skin,
stratum granulosum - ✔✔3-4 flattened cell layers, contain chemical
precursor to keratin . (keratohylin), looks grainy
stratum lucidum - ✔✔normally a very thin layer of cells, only visible in
calloused skin
stratum corneum - ✔✔hundreds of layers of thick, dead, keratin-filled cells
2
100% Pass Guarantee Katelyn Whitman, All Rights
