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A&P 1551: TEST 2 REVIEW – COLLEGE OF DUPAGE 2026/2027 | COMPLETE STUDY GUIDE, PRACTICE QUESTIONS & EXAM REVIEW

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A&P 1551: TEST 2 REVIEW – COLLEGE OF DUPAGE 2026/2027 | COMPLETE STUDY GUIDE, PRACTICE QUESTIONS & EXAM REVIEW

Institution
College Of Dupage
Course
A&P 1551

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A&P 1551: TEST 2 REVIEW – COLLEGE OF DUPAGE 2026/2027 | COMPLETE STUDY GUIDE,
PRACTICE QUESTIONS & EXAM REVIEW



Four types of cells: - ANS ✔✔Keratinocytes, melanocytes, Langerhans, Merkel



Stratum Basale: - ANS ✔✔Deepest layer of epidermis



Stratum Spinosum: - ANS ✔✔Superior to the Basale layer; 8-10 layers of skin cells; provides
strength & flexibility to epidermis



Stratum Granulosum: - ANS ✔✔Superior to the spinosum layer; 3-5 layers were cells start to
undergo cell death



Stratum Lucidum: - ANS ✔✔Extra layer found only in fingertips, palms, soles



StratumCorneum: - ANS ✔✔Most superficial layer; 25-30 layers thick



Dermis: - ANS ✔✔Middle part of skin; mostly connective tissue



Papillary region: - ANS ✔✔Superior part of dermis; made mostly of areolar tissue with elastic
fibers



Reticular region: - ANS ✔✔Inferior portion of the dermis; made of dense irregular tissue;
provides skin with strenght



Subcutaneous layer: - ANS ✔✔Made up of areolar and adipose tissue



Melanin: - ANS ✔✔pigment produced by melanocytes

, Melanocytes: - ANS ✔✔Activated by UV light which produces more pigment



Shaft: - ANS ✔✔Portion of hair you can see



Root: - ANS ✔✔Portion of hair below skin



3 rings in hair - ANS ✔✔Medulla, cortex, cuticle



Hair Follicle: - ANS ✔✔Structure that surrounds root of hair



Bulb: - ANS ✔✔The base; houses papilla



Papilla of the hair: - ANS ✔✔Indentation in the hair bulb: blood vessels in papilla nourish the
hair



Matrix: - ANS ✔✔Where new hair cells are born



Arrector Pili Muscle: - ANS ✔✔Smooth muscle that contracts to make hair follicle stand on end



Two stages of hair growth: - ANS ✔✔Growth and resting



3 types of skin glands: - ANS ✔✔Sebaceous, sudoriferous, ceruminous



Sebaceous glands: - ANS ✔✔Oil-sebum prevents drying out of skin; prevents water evaporation
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