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CHAPTER ONE. Anatomy and Physiology of the Integumentary System

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The primary characteristic of the skin that enables it to withstand friction and shear forces is

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a. The number of layers in the epidermis.

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b. The amount of water and lipids in the interstitial spaces.

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c. The reticular formation of the dermal/epidermal junction.

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d. The nerve supply that alerts the body to abnormal mechanical forces.

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Fibroblasts, mast cells, and macrophages, all necessary for skin renewal and regeneration, are located primarily

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a. In the stratum basale of the epidermis.

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b. In the papillary layer of the dermis.

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c. In the reticular layer of the dermis.

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d. Throughout all the layers of the dermis and epidermis.

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The epidermal layer that is located in the palms and soles, giving them additional strength and thickness, is the

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a. Stratum basale.

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b. Stratum granulosum.

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c. Stratum corneum.

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d. Stratum lucidum.

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The epidermis prevents loss of fluid because of its dense matrix of

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a. Lipids and proteins.

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b. Corneocytes.

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c. Dermosomes.

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d. Vitamin complexes.

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Langerhans cells contribute to innate immunity by

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a. Pricking the bacteria cell wall and causing cytoplasmic leaks.

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b. Presenting antigens to the T-leukocytes.

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c. Phagocytosis of dead tissue that feeds bacteria.

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d. Creating an acidic environment on the skin surface.

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Which cells are responsible for storing melanin in the form of melanosomes?

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a. Corneocytes

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b. Keratinocytes

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c. Melanocytes

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d. Monocytes

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