Describe The Epidermis Case Study
11. What is sweat composed of and what are two functions of sweat? Water, salts, urea, uric acid, amino acids, ammonia, sugar, lactic acid, ascorbic acid, and pheromones. Two functions are to regulate body temperature and rid body of waste.
12. Name two types of sweat glands and differentiate between the two. Eccrine and Apocrine sweat glands. The apocrine glands are slightly larger and produce a thicker and more odorous sweat. The eccrine glands are located over almost the entire body, the apocrine glands are located mainly in the armpits, genital area, and around the …show more content…
15. What are sebaceous glands, where are they found, and what is their function?
Connected to hair follicles; located in the dermis. Most secrete directly into follicles but some directly onto the skin. Their gland shape differs depending on location. Function is to secrete oil.
16. Describe the structure of hair and list some functions of hair. Shaft consists of the medulla - inner layer, air spaces; cortex - middle layer, pigments; cuticle - outermost layer, hard keratin. Root- similar to shaft, but within dermis. Follicle - surrounds root. Sheath - supports shaft & root. Bulb - enlarged layered structure at base where hair is generated; papilla - areolar connective tissue, blood vessels supply nutrients; matrix - germination layer of papilla that builds hair shaft. Sebaceous glands- release oil. Arrector Pili- smooth muscle.
17. What is the hair follicle and what are some structures associated with it? It’s a skin organ that produces hair. Structures associated are infundibulum, the arrector pili muscles, the sebaceous glands, and the apocrine sweat glands.
18. How does testosterone influence hair …show more content…
What causes male pattern baldness? A follicular response to DHT.
21. Discuss the structure and function of nails. The nail matrix is the tissue which the nail protects. The lunula is the visible part of the nail; the white crest shape. The nail bed is the skin beneath the nail plate. The nail sinus is where the nail root is inserted. The nail root is the base of the nail underneath the skin. The nail plate is the actual nail. The nail has the function of protecting the distal phalanx, the fingertip, and the surrounding soft tissues from injuries.
22. Name and discuss six functions of the integumentary system. * Protection- chemical (low pH secretions & bacterial activity), physical/mechanical (keratin &glycolipids block most water & water soluble substances), biological barriers (dendritic cells, macrophages & DNA). * Body temperature regulation- helps keep body temperature at a normal level. * Cutaneous sensations- sense touch, pain, and temperature. * Metabolic functions- synthesis of Vitamin D, chemical conversion of carcinogens and other horomones. * Blood reservoir- makes up 5% of body’s blood volume. * Excretion- rid body of nitrogenous waste and