Question |
Answer |
The dermis is comprised of _______ and supports the nerve and vascular network. |
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Collagen bundles
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The subcutaneous layer of the integumentary system is composed of _________. |
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Fat and loose connective tissue
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What are the two major types of epidermal cells? |
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Keratinocytes (majority) and the melanocytes
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Melanocytes are housed in the stratum ___________ of the epidermis, also known as the basal layer. |
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Stratum Germinativum
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What is the function of melanocytes? |
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To give color to the skin and hair and protect the body from UV light
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__________ are epidermal cells that are synthesized in the basal layer and move to the surface where they flatten and die to form the stratum corneum (outer layer). |
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Keratinocytes
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Keratin is a fibrous protein produced by keratinocytes that is vital for __________. |
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The protective barrier function of the skin
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Changes in _______ account for many skin problems, such as psoriasis. |
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Cell cycle
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What is the function of the dermis? |
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It assists in regulation of body temperature and blood pressure
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Which layer of the dermis is responsible for the formation of fingerprints? |
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Papillary layer
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_________ forms the greatest part of the dermis and is responsible for the mechanical strength of the skin. |
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Collagen
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The primary cell type of the dermis is the __________. |
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Fibroblast
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Fibroblasts produce collagen and elastin fibers and are important for _________. |
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Wound healing
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Where are nerves, lymphatic vessels, hair follicles and sebaceous glands located in the integumentary system? |
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In the dermis
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T/F Subcutaneous tissue lies beneath the dermis and is part of the skin. |
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False. It is not part of the skin, it lies directly beneath the dermis attaches skin to underlying bone and muscle
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What are the functions of subcutaneous tissue? |
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It attaches skin to underlying muscle and bone, provides insulation, stores lipids, regulates temperature and provides shock absorption
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What structures are considered skin appendages? |
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Hair, nails, sebaceous, eccrine and apocrine glands
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The ________ layer develops skin appendages and the ________ layer provides nutrients, electrolytes, and fluids. |
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Epidermis develops them, dermis feeds them
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What places on the body grow no hair? |
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The lips, palms of the hands and soles of the feet
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Nails grow from the matrix, also called the _______. |
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Lunula (crescent shaped area of the nail)
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