Chapter 5: The Integumentary System Principles of Anatomy and Physiology, 12th Edition, by Bryan Derrickson, Gerald Tortora.

Principles of Anatomy and Physiology, 12th Edition, by Bryan Derrickson, Gerald Tortora. Multiple Choice & Essays 1. This is another name for the subcutaneous layer. a. Dermis b. Epidermis c. Corpuscle d. Basale e. Hypodermis Ans: E Difficulty: easy Feedback: 5.1 2. This layer is composed of keratinized stratified squamous epithelium. a. Epidermis b. Dermis c. Hypodermis d. Subcutaneous e. Corpuscle Ans: A Difficulty: easy Feedback: 5.1 3. Keratin a. Is a protein b. Helps protect the bone from viruses c. Is a protein that is made of melanocytes d. Both a and c e. All of the above Ans: A Difficulty: medium Feedback: 5.1 4. This pigment absorbs ultraviolet light. a. Keratin b. Melanin c. Melatonin d. Carotene e. Nigrosin Ans: B Difficulty: medium Feedback: 5.1 5. This epidermal cell has a role in immunity and disease resistance. a. Langerhans b. Keratinocytes c. Melanocyte d. Merkel cell e. Corpuscle Ans: A Difficulty: medium Feedback: 5.1 6. This layer of epidermis is composed of a single row of cuboidal or columnar keratinocytes. a. Stratum basale b. Stratum spinosum c. Stratum granulosum d. Stratum lucidum e. Stratum corneum Ans: A Difficulty: medium Feedback: 5.1 7. This layer of the epidermis contains layers of flattened keratinocytes that are going through apoptosis. a. Stratum basale b. Stratum spinosum c. Stratum granulosum d. Stratum lucidum e. Stratum corneum Ans: C Difficulty: medium Feedback: 5.1 8. The stratum lucidum a. Contains lamellar granules b. Lies just superficially to stratum basale c. Is the layer used in a skin graft d. Is present only in thick skin e. Consists of 25-30 layers of dead keratinocytes. Ans: D Difficulty: medium Feedback: 5.1 9. Constant exposure of skin to friction stimulates the formation of a callus which is the thickening of which layer? a. Stratum basale b. Stratum spinosum c. Stratum granulosum d. Stratum lucidum e. Stratum corneum Ans: E Difficulty: medium Feedback: 5.1 10. Keratinization a. Is the process of synthesizing pigment in the skin b. Is the process of cells accumulating keratin c. Is only seen in thin skin d. Is the process of synthesizing pigment and accumulating keratin e. None of the above Ans: B Difficulty: medium Feedback: 5.1