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- List the four types of cells in the epidermis and their function: 1. 2. 3. 4. Which of these cells is the most abundant?List and describe the four cell types found in the epidermis.Keratinocytes are the major cellular components of the epidermis. They are found in the four major epidermal strata: basale, spinosum, granulosum and corneum. Explain the characteristics of and the changes in the keratinocytes as they journey from the deepest to the most superficial epidermal strata.
- List the five layers of epidermis from deep to superficial.What are the distinctive features of each layer? Which layeris often absent?List the five cell types of the epidermis. Describe theirlocations and functions.From deepest to most superficial, name and describe thefive strata of the epidermis. In which stratum are new cellsformed by mitosis? Which strata have live cells, and whichstrata have dead cells?
- Is it true that when new cells are made in the epidermis, they begin to move toward the surface?Cells of the epidermis derive from stem cells of the stratum basale. Describe how the cells change as they become integrated into the different layers of the epidermis. What determines the color of skin, and what Is the process that darkens skin when it is exposed to UV light?What is the tough, water-repellent layer of the epidermis called?
- Describe the types of cells found in the epidermis and explain their functions .Match each epidermal layer in column B to its description in column A.Column A Column B(1) Desmosomes and shrinkage artifacts give its cells “spiny”projections. (a) stratum basale(2) Its cells are flat, dead bags of keratin. (b) stratum corneum(3) Its cells divide, and it is also called the stratum germinativum. (c) stratum granulosum(4) It contains keratohyalin and lamellated granules. (d) stratum lucidum(5) It is present only in thick skin. (e) stratum spinosumOur skin discharges two types of secretions via glands. Explain the similarities and differences across the three different glands secreting either sweat or sebum (hint: include the specific secretion and secretion composition, mode of emission, and secretion function).
