Chap. 5 - Practice Student: ________________________________________________________________________ ___ 1. The hypodermis A. is also called subcutaneous tissue. B. is loose connective tissue that attaches the skin to underlying bone and muscle. C. is important for padding and insulation. D. contains about half of the body's stored fat. E. has all of these characteristics. 2. The hypodermis A. can be used to estimate total body fat. B. is usually considered to be part of the skin itself. C. is a layer of dense connective tissue. D. is the layer between the dermis and epidermis. E. has all of these characteristics. 3. Fingerprints and footprints are produced by dermal projections into the epidermis called A. striae. B. cleavage lines. C. papillae. D. reticular lines. E. subcutaneous tissue. 4. Keratinization A. is a process that epidermal cells undergo as they move to the surface. B. produces cells filled with keratin. C. gives the stratum corneum its structural strength. D. produces an outer layer of epidermal cells that resist abrasion. E. has all of these properties. 5. The stratum corneum of the epidermis A. consists of continuously dividing cells. B. can become thickened and form a structure called a callus or corn. C. has cells that are continuously moving toward the stratum basale. D. has cells that synthesize melanin. E. has all of these characteristics. 6. Melanin A. is a pigment produced by cells in the stratum corneum. B. is produced by melanocytes. C. is responsible for cyanosis. D. is responsible for birthmarks. E. is all of these. 7. Melanin A. is absent in individuals with the recessive genetic trait of albinism. B. is transferred to other cells by melanosomes. C. production is increased with exposure to ultraviolet light. D. is present in large quantities in moles, freckles, the genitalia, and nipples. E. has all of these properties. 8. One type of experimental contraceptive device is a skin patch that contains a chemical absorbed through the skin. Which of the following substances would most likely be the type of chemical involved? A. a protein B. substances dissolved in water C. a steroid D. a carbohydrate E. either a protein or a carbohydrate or both together 9. Which of the following statements about hair is NOT correct? A. The hair follicle is an extension of the epidermis into the dermis. B. The hair root and shaft are made up of continuously dividing cells. C. The cuticle is a single layer of overlapping cells that holds the hair in the follicle. D. Hair grows in cycles. E. The hair follicle can be an important source of epithelial cells for repairing areas of the surface epidermis. 10. Scalp hairs are longer than eyelash hairs because A. people don't rub their head as often as they rub their eyes. B. tears have a growth inhibitor in them. C. scalp hairs are exposed to higher temperatures than eyelashes. D. scalp hairs have a much longer growth cycle than eyelashes. E. the hair follicles are deeper for scalp hairs. 11. Which of the following statements about glands of the skin is true? A. Sebaceous glands produce an oily white substance rich in lipids. B. Sebum is important in cooling the body. C. Merocrine sweat glands become active at puberty because of the influence of sex hormones. D. Merocrine sweat glands produce a thick secretion rich in organic substances. E. All of these are true. 12. Which of the following statements is FALSE? A. Nails grow continually and do not have a resting stage. B. The nail consists of layers of living cells from the stratum corneum. C. The cells of a nail are filled with a special hard type of keratin. D. The nail matrix and nail bed have a stratum basale. E. The production of cells within the nail matrix results in the growth of the nail. 13. When exposed to the cold, the ears and nose may appear red. This is because A. blood vessels in the nose and ears have constricted to conserve heat. B. cyanosis occurs when blood flow slows down. C. the nose and ears have a thicker, more keratinized stratum corneum than the rest of the face. D. cold causes an inflammatory reaction in the nose and ears. E. blood vessels dilate to prevent tissue damage from the cold. 14. Vitamin D A. stimulates calcium and phosphate uptake in the small intestine. B. is formed from a precursor molecule that is made when skin is exposed to ultraviolet light. C. is formed from a precursor molecule that is modified in the liver and kidneys. D. may be required in the diet if a person is exposed to very little ultraviolet light. E. has all of these properties. 15. Dark-skinned children are more susceptible to rickets (weak bones, bowed legs) than fair-skinned children because A. dark skin has more melanin and melanin absorbs more ultraviolet light allowing less UV radiation to penetrate into the skin and therefore less Vitamin D production. B. dark skin has less melanin and melanin is a precursor to vitamin D. C. ultraviolet light normally prevents formation of a precursor molecule to vitamin D. D. both dark skin has more melanin and melanin absorbs more ultraviolet light allowing less UV radiation to penetrate into the skin and ultraviolet light normally prevents formation of a precursor molecule to vitamin D occur. E. dark skin has less melanin and melanin is a precursor to vitamin D and ultraviolet light normally prevents formation of a precursor molecule to vitamin D. 16. Chef Buoy Yardee is burned on the arm when a kettle of spaghetti sauce explodes. The doctor, using a forceps, pulls on a hair within the area that is burned. The hair easily pulls out. What degree of burn did the patient have? A. first degree burn B. second degree burn C. third degree burn 17. Malignant melanoma A. is the least dangerous form of skin cancer. B. usually arises from melanocytes in a preexisting mole. C. rarely metastasizes. D. is the most common type of skin cancer. E. is the least dangerous form of skin cancer and usually arises from melanocytes in a preexisting mole. 18. Given that viruses are not affected by antibiotics, which of the following types of skin infection might be successfully treated with an antibiotic? A. cold sores B. chicken pox C. acne D. warts E. All of these should respond favorably to antibiotic treatment. 19. Which type of glands help to cool the body? A. merocrine sweat glands B. apocrine sweat glands C. sebaceous glands D. both merocrine and apocrine sweat glands E. All glands of the skin have this property. 20. The ___________ is the layer of the skin made of epithelial tissue and the __________ is composed of dense connective tissue. A. epidermis; dermis B. epidermis; hypodermis C. dermis; epidermis D. dermis; hypodermis E. hypodermis; dermis 21. When a cancer is said to have metastasized, it means that A. it has stopped growing. B. it has spread to other areas of the body. C. it has been destroyed by the body's defenses. D. it has broken through the epidermis and formed a freckle on the skin. E. it has changed color and shrunk in size.