Chapter 22

3. produce cerumen, protective of ear canal
5. open into hair follicles. Contain pheromones, which stimulate
7. skin plays a minor role in excretion through elimination of water, salt, and wastes such as urea
8. pili muscles attached to hair follicles contract upon stimulated by fright, anxiety, cold, causing goose bumps.
11. skin has limited properties of absorption
12. the most dominant cell type of epidermis. Secrete sebum, formed in sebaceous glands, that retains water repels microorganisms
13. Produce pigment (melanin), which darkens skin, protecting against DNA damage & subsequent skin cancer. Also found in iris & retina
14. functions of the integumentary system are:
17. thin outer region of skin and is composed of epithelial tissue; outer layer, avascular (lacks blood vessels)Cells
18. reflexes in newborns
20. produces sweat, which helps regulate body temperature

1. skin acts as a physical barrier and protects underlying tissues
2. excessive decrease in body temp, hyperthermia excessive increase in body temp
4. the most numerous types of sweat glands
6. skin helps synthesize vitamin D, a nutrient necessary for the absorption of calcium by the gastrointestinal tract
9. produce sebum – mildly antibacterial & antifungal. Connected to hair follicles
10. maintenance of body temperature. Regulated by hypothalamus. 98.6 (37 C) average
15. skin serves in immunologic responses by acting as a biologic and chemical barrier
16. skin plays a role in temperature regulation through changes in blood flow and activity of sweat glands
19. skin is a sophisticated sensory organ and houses receptors for touch, pressure, and temperature.