Biology 241 – Lecture
Chapter 5 (Integumentary System)
Practice Quiz
I. Circle the letter preceding the one best answer to each question:
1. “Goose bumps” occur as a result of:
A. Contraction of arrector pili muscles
C. Contraction of elastic fibers in the bulb of the hair follicle
B. Secretion of sebum
D. Contraction of papillae
2. Select the one FALSE statement about the stratum basale of epidermis:
A. It does normally contain keratinocytes. B. It consists of a single layer of squamous epithelial cells.
C. It is the deepest layer of the epithelium. D. It is the one layer of cells that can undergo cell division.
3. Select the one FALSE statement:
A. Epidermis is composed of epithelium.
B. White hair can be due to presence of air bubbles in the hair.
C. Dermis is composed of connective tissue. D. Carotene is a pigment that gives red color to the skin
4. The medical specialty that deals with diagnosis and treatment of skin disorders is:
A. Oncology
B. Myology
C. Cytology
D. Dermatology
5. Select the skin cell that functions in immunity:
A. Merkel’s cell B. Langerhans cell C. Melanocyte
D. Keratinocyte
II. Arrange the answers in their correct sequence:
_____, _____, _____ 6. From most superficial to deepest: A. Dermis B. Epidermis
C. Subcutaneous layer
_____, _____, _____ 7. From superficial to deep: A. Stratum lucidum B. Stratum corneum C. Stratum basale
III. Circle T (True) or F (False). If the statement is false, cross out the word(s) that make it false and
write in an appropriate correction so that the statement now becomes a true statement.
T F
8. The two regions into which the dermis can be divided are the papillary region and the fibrous region.
T F
9. Both epidermis and dermis contain blood vessels (that is, they are both vascular.)
T F 10. Both sudoriferous glands and sebaceous glands are normally found on the palms and soles.
IV. Using the blanks provided, fill-in the word or phrase that best fits the description given:
_______________________11. This is a substance (needed for absorption of calcium from the diet) whose formation begins with a chemical in the skin influenced by ultraviolet radiation.
_______________________12. This is the layer of skin cells that is sloughed off (after becoming keratinized).
_______________________13. This is an abnormal thickening of the epidermis as a result of constant exposure
to friction or pressure.
_______________________14. This is the pigment responsible for the black, brown, or tan color of skin.
(A brief explanation needed here) 15. When the temperature of the body increases, nerve messages from the brain to
the skin decrease body temperature by: