LESSON CHALLENGE Multiple choice. Indicate one correct answer for each question. 1. Functions of the skin include regulation of body temperature and: a. digestion c. circulation b. protection d. reproduction 2. Which of the following layers of skin does not contain any blood vessels? a. cutis c. corneum b. dermal d. epidermis 3. Where does mitosis (cell division) or replacement of the skin cells take place? a. stratum basale c. stratum corneum b. stratum lucidum d. stratum granulosum 4. Which of the following items determines the color of the skin? a. keratin c. elastin fiber b. melanin d. collagen protein 5. The stratum lucidum layer is found only on the: a. scalp c. tops of hands b. elbows d. soles of the feet and palms of hands 6. Which layer of the skin contains collagen protein and elastin fibers which lend support to the epidermis and give the skin its elastic quality? a. dermal c. stratum lucidum b. epidermis d. stratum granulosum 7. Sweat is excreted by what gland? a. adrenal c. sebaceous b. endocrine d. sudoriferous