BIOS 251 Week 5 Exam 2 Study Guide; Integumentary System & Skin Layers
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BIO251 Week 5 Study Guide BIOS 251 Week 5 Exam 2 Study Guide; Integumentary System & Skin Layers Possible MC questions: What organs make up the integumentary system? Skin, nails, glands What are the three layers of the skin? Epidermis Dermis Hypodermis What are the five layers (strata) of the epidermis, going from superficial to deep? Stratum lucidium is only found in THICK skin Label the three layers of the skin and the 5 layers of the epidermis. What are the types of cells found in the epidermis? In which layer are they found and what are their functions? Melanocytes = produce melanin (skin pigment); found in stratum basale Ketatinocytes = most abundant cells in the epidermis; produce keratin Dendritic = immunological function What are the two types of skin? Where is each type found on the body? Thick = palms, soles of feet Thin = fingers What are the two layers of the dermis? Papillary (superficial) Reticular (deep) What are the components/tissue types found in dermis layer of skin? What are the four tactile mechanoreceptions found in the skin? What layer are they found in and what are their functions? Pacinian Corpuscles – found in dermis; sense DEEP pressure, HIGH frequency Meissner’s Corpuscles – Dermis + Epidermis; low frequency vibration Merkel cells – epidermis; light touch Ruffinni Endings – dermis; sense stretch What are the two components/tissue types found in the hypodermis?
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