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QUESTION 1 Match each major part of the integumentary system with its proper structure and/or function. Made of areolar connective and adipose tissueContains the accessory structures of the skin, such as receptors and sweat glandsThe outer layer of the skin, made of stratified squamous epitheliumConnects the dermis to the muscles and stores fatMitosis constantly renews this layer, which forms a barrier between the body and the externalenvironmentThe inner layer of the skin, made of fibrous connective tissueA.EpidermisB.DermisC.Subcutaneous TissueQUESTION 2 Match the following parts of the dermis with their proper descriptions.Contains capillaries to nourish the stratum germinativum of the epidermisProvide information about changes in the external environmentThe protein that gives the dermis its strengthProduce a lipid substance calledsebumThe cells that produce collagen and elastinMitosis at the root produces thehair shaftProduce their secretion in timesof stress or strong emotionsProduce their secretion during exercise or in a warm environmentA.FibroblastsB.Collagen fibersC.Elastin fibersD.Papillary layerE.Hair folliclesF. Nail folliclesG.Sebaceous glandsH.Eccrine sweat glandsI.Apocrine sweat glandsJ. ReceptorsC.B.A.C.A.B.D.J .B.G.A.E.I.H.
Mitosis at the root produces thenailThe protein that gives the dermis elasticityQUESTION 3 The dermis is made of irregular fibrous connective tissue. What is the structure and makeup of the matrix of this tissue that contributes to the SPECIFIC functioning of the dermis?The fibers of the dermis are criss-cross and run in all directions. The dermis is made up of collagen (strong) and elastin (elastic- stretchy) fibers. The strength and elasticity allow the skin to provide a barrier to the outside environment and for the skin to recoil after being stretched. QUESTION 4 Reference Figure 5-2 - Which type of cell is capable of self-locomotion? Where does this type of cell originate? What does it carry and to where? What purpose does this serve? The Langerhans cell is capable of self-locomotion. This cell originates in the red bone marrow. The Langerhans picks up (phagocytize) and carries foreign materials, such as bacterium, and transport it to a lymph node. The purpose of this is to trigger an immune response such as the production of antibodies as a response to pathogens.In the epidermis: 1) Where does mitosis take place? 2) What protein do the new cells produce? 3) What purpose does this protein serve and where? 4) What happens to these cells as they move toward the surface? 5) What are Merkel cells?Mitosis takes place in the epidermis in stratum germinativum (stratum basale). The new cells produce the protein keratin. In the Stratum germinativum living keratinocytes are able to synthesize antimicrobial peptides called defensins and as they get farther away from the capillaries of the dermis they die. In the stratum corneum keratin prevents loss and entry of water and can also resist the entry of chemicals and pathogens. Merkel cells are receptors for the sense of